Fix undeclared declarations of string/vector/list; prefix declarations with 'std::'

Signed-off-by: aneejit1 <[email protected]>

23 files changed, 147 insertions, 110 deletions

diff --git a/src/kqalculate.cpp b/src/kqalculate.cpp
index 57e328c..5e68271 100644
--- a/src/kqalculate.cpp
+++ b/src/kqalculate.cpp
@@ -79,6 +79,9 @@
 #include <math.h>
 #include <dirent.h>
 #include <pthread.h>
+#include <vector>
+#include <string>
+#include <stack>
 #include <tqsimplerichtext.h>
 #include <tqstatusbar.h>
 #include <tqwidgetstack.h>
@@ -139,11 +142,11 @@ extern bool enable_expression_completion;
 
 extern TQString initial_history;
 extern tree_struct function_cats, unit_cats, variable_cats;
-extern vector<void*> ia_units, ia_variables, ia_functions;
-extern vector<MathFunction*> recent_functions;
-extern vector<Variable*> recent_variables;
-extern vector<Unit*> recent_units;
-vector<MathStructure> result_parts;
+extern std::vector<void*> ia_units, ia_variables, ia_functions;
+extern std::vector<MathFunction*> recent_functions;
+extern std::vector<Variable*> recent_variables;
+extern std::vector<Unit*> recent_units;
+std::vector<MathStructure> result_parts;
 
 KnownVariable *vans[5];
 int vans_id_start[5];
@@ -174,7 +177,7 @@ uint initial_result_index = 0;
 
 extern bool show_keypad, show_history, show_stack;
 
-extern vector<mode_struct> modes;
+extern std::vector<mode_struct> modes;
 
 extern TQValueVector<TQString> inhistory;
 extern TQValueVector<int> inhistory_type;
@@ -1416,7 +1419,7 @@ TQString draw_structure(MathStructure &m, const TQFont &font, const TQColorGroup
 	if(m.precision() > 0 && (ips_n.parent_precision < 1 || m.precision() < ips_n.parent_precision)) ips_n.parent_precision = m.precision();
 	switch(m.type()) {
 		case STRUCT_NUMBER: {
-			string exp = "";
+			std::string exp = "";
 			bool exp_minus;
 			ips_n.exp = &exp;
 			ips_n.exp_minus = &exp_minus;
@@ -1465,8 +1468,8 @@ TQString draw_structure(MathStructure &m, const TQFont &font, const TQColorGroup
 
 			ips_n.depth++;
 
-			vector<TQString> terms;
-			vector<bool> do_space;
+			std::vector<TQString> terms;
+			std::vector<bool> do_space;
 			for(size_t i = 0; i < m.size(); i++) {
 				if(m[i].type() == STRUCT_NEGATE && i > 0) {
 					ips_n.wrap = m[i][0].needsParenthesis(po, ips_n, m, i + 1, ips.division_depth > 0 || ips.power_depth > 0, ips.power_depth > 0);
@@ -1526,9 +1529,9 @@ TQString draw_structure(MathStructure &m, const TQFont &font, const TQColorGroup
 			}
 
 			bool par_prev = false;
-			vector<int> nm;
-			vector<TQString> terms;
-			vector<bool> do_space;
+			std::vector<int> nm;
+			std::vector<TQString> terms;
+			std::vector<bool> do_space;
 			for(size_t i = 0; i < m.size(); i++) {
 				ips_n.wrap = m[i].needsParenthesis(po, ips_n, m, i + 1, ips.division_depth > 0 || ips.power_depth > 0, ips.power_depth > 0);
 				terms.push_back(draw_structure(m[i], font, cg, po, ips_n));
@@ -1647,7 +1650,7 @@ TQString draw_structure(MathStructure &m, const TQFont &font, const TQColorGroup
 				h = (int) (textsmall.height() / 1.5);
 				h += h % 2;
 
-				string filename = getLocalDir();
+				std::string filename = getLocalDir();
 				if(saved_divisionline_height != h) {
 				
 					TQPixmap *pixmap = new TQPixmap(10, h);
@@ -1974,11 +1977,11 @@ TQString draw_structure(MathStructure &m, const TQFont &font, const TQColorGroup
 			TQString str;
 			const ExpressionName *ename = &m.unit()->preferredDisplayName(po.abbreviate_names, po.use_unicode_signs, m.isPlural(), po.use_reference_names, po.can_display_unicode_string_function, po.can_display_unicode_string_arg);
 			if(m.prefix()) {
-				str += m.prefix()->name(po.abbreviate_names && ename->abbreviation && (ename->suffix || ename->name.find("_") == string::npos), po.use_unicode_signs, po.can_display_unicode_string_function, po.can_display_unicode_string_arg).c_str();
+				str += m.prefix()->name(po.abbreviate_names && ename->abbreviation && (ename->suffix || ename->name.find("_") == std::string::npos), po.use_unicode_signs, po.can_display_unicode_string_function, po.can_display_unicode_string_arg).c_str();
 			}
 			if(ename->suffix && ename->name.length() > 1) {
 				size_t i = ename->name.rfind('_');
-				bool b = i == string::npos || i == ename->name.length() - 1 || i == 0;
+				bool b = i == std::string::npos || i == ename->name.length() - 1 || i == 0;
 				size_t i2 = 1;
 				if(b) {
 					if(is_in(NUMBERS, ename->name[ename->name.length() - 1])) {
@@ -2026,7 +2029,7 @@ TQString draw_structure(MathStructure &m, const TQFont &font, const TQColorGroup
 			const ExpressionName *ename = &m.variable()->preferredDisplayName(po.abbreviate_names, po.use_unicode_signs, false, po.use_reference_names, po.can_display_unicode_string_function, po.can_display_unicode_string_arg);
 			if(ename->suffix && ename->name.length() > 1) {
 				size_t i = ename->name.rfind('_');
-				bool b = i == string::npos || i == ename->name.length() - 1 || i == 0;
+				bool b = i == std::string::npos || i == ename->name.length() - 1 || i == 0;
 				size_t i2 = 1;
 				if(b) {
 					if(is_in(NUMBERS, ename->name[ename->name.length() - 1])) {
@@ -2077,7 +2080,7 @@ TQString draw_structure(MathStructure &m, const TQFont &font, const TQColorGroup
 			const ExpressionName *ename = &m.function()->preferredDisplayName(po.abbreviate_names, po.use_unicode_signs, false, po.use_reference_names, po.can_display_unicode_string_function, po.can_display_unicode_string_arg);
 			if(ename->suffix && ename->name.length() > 1) {
 				size_t i = ename->name.rfind('_');
-				bool b = i == string::npos || i == ename->name.length() - 1 || i == 0;
+				bool b = i == std::string::npos || i == ename->name.length() - 1 || i == 0;
 				size_t i2 = 1;
 				if(b) {
 					if(is_in(NUMBERS, ename->name[ename->name.length() - 1])) {
@@ -2326,7 +2329,7 @@ void *view_proc(void *pipe) {
 		if(mm && m.isMatrix()) {
 			mm->set(m);
 			MathStructure mm2(m);
-			string mstr;
+			std::string mstr;
 			int c = mm->columns(), r = mm->rows();
 			for(int index_r = 0; index_r < r; index_r++) {
 				for(int index_c = 0; index_c < c; index_c++) {
@@ -2422,7 +2425,7 @@ void reduceDivLineSize(QalculateResultDisplay *resultLabel) {
 		h = (int) (textsmall.height() / 1.5);
 		h += h % 2;
 
-		string filename = getLocalDir();
+		std::string filename = getLocalDir();
 		if(saved_divisionline_height != h) {
 				
 			TQPixmap *pixmap = new TQPixmap(10, h);
@@ -3030,7 +3033,7 @@ void KQalculate::execute_expression2() {
 			if(f) CALCULATOR->calculateRPN(f, 0, evalops, parsed_mstruct);
 			else CALCULATOR->calculateRPN(op, 0, evalops, parsed_mstruct);
 		} else {
-			string str2 = CALCULATOR->unlocalizeExpression(str.ascii(), evalops.parse_options);
+			std::string str2 = CALCULATOR->unlocalizeExpression(str.ascii(), evalops.parse_options);
 			CALCULATOR->parseSigns(str2);
 			if(str2.length() == 1) {
 				do_mathoperation = true;
@@ -3291,13 +3294,13 @@ void KQalculate::create_vmenu() {
 
 	menu_variables_ids.clear();
 
-	stack<TQPopupMenu*> menus;
+	std::stack<TQPopupMenu*> menus;
 	menus.push(sub);
 	sub3 = sub;
 	while(titem) {
 		sub = new TQPopupMenu();
 		TQObject::connect(sub, SIGNAL(activated(int)), this, SLOT(onVariableMenuItemActivated(int)));
-		if(titem->item.find('&') != string::npos) {
+		if(titem->item.find('&') != std::string::npos) {
 			TQString str2 = titem->item.c_str();
 			str2.replace("&", "&&");
 			sub3->insertItem(str2, sub, -1, 0);
@@ -3309,7 +3312,7 @@ void KQalculate::create_vmenu() {
 		for(size_t i = 0; i < titem->objects.size(); i++) {
 			v = (Variable*) titem->objects[i];
 			if(v->isActive() && !v->isHidden()) {
-				if(v->title(true).find('&') != string::npos) {
+				if(v->title(true).find('&') != std::string::npos) {
 					TQString str2 = v->title(true).c_str();
 					str2.replace("&", "&&");
 					menu_variables_ids[sub->insertItem(str2)] = v;
@@ -3386,13 +3389,13 @@ void KQalculate::create_fmenu() {
 
 	menu_functions_ids.clear();
 
-	stack<TQPopupMenu*> menus;
+	std::stack<TQPopupMenu*> menus;
 	menus.push(sub);
 	sub3 = sub;
 	while(titem) {
 		sub = new TQPopupMenu();
 		TQObject::connect(sub, SIGNAL(activated(int)), this, SLOT(onFunctionMenuItemActivated(int)));
-		if(titem->item.find('&') != string::npos) {
+		if(titem->item.find('&') != std::string::npos) {
 			TQString str2 = titem->item.c_str();
 			str2.replace("&", "&&");
 			sub3->insertItem(str2, sub, -1, 0);
@@ -3404,7 +3407,7 @@ void KQalculate::create_fmenu() {
 		for(size_t i = 0; i < titem->objects.size(); i++) {
 			f = (MathFunction*) titem->objects[i];
 			if(f->isActive() && !f->isHidden()) {
-				if(f->title(true).find('&') != string::npos) {
+				if(f->title(true).find('&') != std::string::npos) {
 					TQString str2 = f->title(true).c_str();
 					str2.replace("&", "&&");
 					menu_functions_ids[sub->insertItem(str2)] = f;
@@ -3484,13 +3487,13 @@ void KQalculate::create_umenu() {
 
 	menu_units_ids.clear();
 
-	stack<TQPopupMenu*> menus;
+	std::stack<TQPopupMenu*> menus;
 	menus.push(sub);
 	sub3 = sub;
 	while(titem) {
 		sub = new TQPopupMenu();
 		TQObject::connect(sub, SIGNAL(activated(int)), this, SLOT(onUnitMenuItemActivated(int)));
-		if(titem->item.find('&') != string::npos) {
+		if(titem->item.find('&') != std::string::npos) {
 			TQString str2 = titem->item.c_str();
 			str2.replace("&", "&&");
 			sub3->insertItem(str2, sub, -1, 0);
@@ -3502,7 +3505,7 @@ void KQalculate::create_umenu() {
 		for(size_t i = 0; i < titem->objects.size(); i++) {
 			u = (Unit*) titem->objects[i];
 			if(u->isActive() && !u->isHidden()) {
-				if(u->title(true).find('&') != string::npos) {
+				if(u->title(true).find('&') != std::string::npos) {
 					TQString str2 = u->title(true).c_str();
 					str2.replace("&", "&&");
 					menu_units_ids[sub->insertItem(str2)] = u;
@@ -3608,13 +3611,13 @@ void KQalculate::create_toumenu() {
 
 	menu_to_unit_ids.clear();
 
-	stack<TQPopupMenu*> menus;
+	std::stack<TQPopupMenu*> menus;
 	menus.push(sub);
 	sub3 = sub;
 	while(titem) {
 		sub = new TQPopupMenu();
 		TQObject::connect(sub, SIGNAL(activated(int)), this, SLOT(onConvertToUnitMenuItemActivated(int)));
-		if(titem->item.find('&') != string::npos) {
+		if(titem->item.find('&') != std::string::npos) {
 			TQString str2 = titem->item.c_str();
 			str2.replace("&", "&&");
 			sub3->insertItem(str2, sub, -1, 0);
@@ -3626,7 +3629,7 @@ void KQalculate::create_toumenu() {
 		for(size_t i = 0; i < titem->objects.size(); i++) {
 			u = (Unit*) titem->objects[i];
 			if(u->isActive() && !u->isHidden()) {
-				if(u->title(true).find('&') != string::npos) {
+				if(u->title(true).find('&') != std::string::npos) {
 					TQString str2 = u->title(true).c_str();
 					str2.replace("&", "&&");
 					menu_to_unit_ids[sub->insertItem(str2)] = u;
@@ -6286,7 +6289,7 @@ void KQalculate::displayParseStatus() {
 		return;
 	}
 	MathStructure mparse, mfunc;
-	string str_e, str_u;
+	std::string str_e, str_u;
 	int pos = expressionEdit->cursorPosition();
 	bool full_parsed = false;
 	bool had_errors = false, had_warnings = false;
diff --git a/src/main.cpp b/src/main.cpp
index c9c9ee6..b56623f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -24,6 +24,7 @@
 
 #include "kqalculate.h"
 #include "preferences.h"
+#include <string>
 #include <twin.h>
 #include <kuniqueapplication.h>
 #include <tdeaboutdata.h>
@@ -152,7 +153,7 @@ void start_qalculate() {
 	
 	CALCULATOR->loadExchangeRates();
 
-	string ans_str = i18n("ans").ascii();
+	std::string ans_str = i18n("ans").ascii();
 	vans[0] = (KnownVariable*) CALCULATOR->addVariable(new KnownVariable(i18n("Temporary").ascii(), ans_str, m_undefined, i18n("Last Answer").ascii(), false));
 	vans[0]->addName(i18n("answer").ascii());
 	vans[0]->addName(ans_str + "1");
diff --git a/src/preferences.cpp b/src/preferences.cpp
index f4f4011..e75ee66 100644
--- a/src/preferences.cpp
+++ b/src/preferences.cpp
@@ -30,6 +30,8 @@
 #include <unistd.h>
 #include <dirent.h>
 #include <stdio.h>
+#include <vector>
+#include <string>
 #include <tdelocale.h>
 #include <tqstringlist.h>
 #include <ktextbrowser.h>
@@ -71,9 +73,9 @@ bool canplot;
 
 TQString initial_history;
 
-extern vector<MathFunction*> recent_functions;
-extern vector<Variable*> recent_variables;
-extern vector<Unit*> recent_units;
+extern std::vector<MathFunction*> recent_functions;
+extern std::vector<Variable*> recent_variables;
+extern std::vector<Unit*> recent_units;
 TQValueVector<TQString> recent_functions_pre;
 TQValueVector<TQString> recent_variables_pre;
 TQValueVector<TQString> recent_units_pre;
@@ -84,7 +86,7 @@ TQStringList expression_history;
 
 bool show_keypad, show_history, show_stack;
 
-vector<mode_struct> modes;
+std::vector<mode_struct> modes;
 
 TQValueVector<TQString> inhistory;
 TQValueVector<int> inhistory_type;
@@ -232,7 +234,7 @@ void load_preferences() {
 	load_global_defs = true;
 	fetch_exchange_rates_at_startup = false;
 	first_time = false;
-	string filename = getLocalDir();
+	std::string filename = getLocalDir();
 	DIR *dir = opendir(filename.c_str());
 	if(!dir) {
 		first_qalculate_run = true;
@@ -661,7 +663,7 @@ void load_preferences() {
 void save_preferences(bool mode) {
 
 	FILE *file = NULL;
-	string filename = getLocalDir();
+	std::string filename = getLocalDir();
 	mkdir(filename.c_str(), S_IRWXU);
 	filename += "qalculate-tde.cfg";
 	file = fopen(filename.c_str(), "w+");
diff --git a/src/qalculate_tde_utils.cpp b/src/qalculate_tde_utils.cpp
index fb34e9a..4bfaf65 100644
--- a/src/qalculate_tde_utils.cpp
+++ b/src/qalculate_tde_utils.cpp
@@ -19,6 +19,9 @@
  ***************************************************************************/
 
 #include "qalculate_tde_utils.h"
+#include <vector>
+#include <string>
+#include <list>
 #include <tqwidget.h>
 #include <tqlabel.h>
 #include <tqlineedit.h>
@@ -28,10 +31,10 @@
 #include "kqalculate.h"
 
 tree_struct function_cats, unit_cats, variable_cats;
-vector<void*> ia_units, ia_variables, ia_functions;
-vector<MathFunction*> recent_functions;
-vector<Variable*> recent_variables;
-vector<Unit*> recent_units;
+std::vector<void*> ia_units, ia_variables, ia_functions;
+std::vector<MathFunction*> recent_functions;
+std::vector<Variable*> recent_variables;
+std::vector<Unit*> recent_units;
 extern PrintOptions printops;
 extern KnownVariable *vans[5];
 extern TQWidget *topWidget;
@@ -81,13 +84,13 @@ bool can_display_unicode_string_function(const char *str, void *arg) {
 void generate_units_tree_struct() {
 	size_t cat_i, cat_i_prev; 
 	bool b;	
-	string str, cat, cat_sub;
+	std::string str, cat, cat_sub;
 	Unit *u = NULL;
 	unit_cats.items.clear();
 	unit_cats.objects.clear();
 	unit_cats.parent = NULL;	
 	ia_units.clear();
-	list<tree_struct>::iterator it;	
+	std::list<tree_struct>::iterator it;	
 	for(size_t i = 0; i < CALCULATOR->units.size(); i++) {
 		if(!CALCULATOR->units[i]->isActive()) {
 			b = false;
@@ -107,7 +110,7 @@ void generate_units_tree_struct() {
 				cat_i = cat.find("/"); cat_i_prev = 0;
 				b = false;
 				while(true) {
-					if(cat_i == string::npos) {
+					if(cat_i == std::string::npos) {
 						cat_sub = cat.substr(cat_i_prev, cat.length() - cat_i_prev);
 					} else {
 						cat_sub = cat.substr(cat_i_prev, cat_i - cat_i_prev);
@@ -129,7 +132,7 @@ void generate_units_tree_struct() {
 						item = &*it;
 						item->item = cat_sub;
 					}
-					if(cat_i == string::npos) {
+					if(cat_i == std::string::npos) {
 						break;
 					}
 					cat_i_prev = cat_i + 1;
@@ -156,13 +159,13 @@ void generate_variables_tree_struct() {
 
 	size_t cat_i, cat_i_prev; 
 	bool b;	
-	string str, cat, cat_sub;
+	std::string str, cat, cat_sub;
 	Variable *v = NULL;
 	variable_cats.items.clear();
 	variable_cats.objects.clear();
 	variable_cats.parent = NULL;
 	ia_variables.clear();
-	list<tree_struct>::iterator it;	
+	std::list<tree_struct>::iterator it;	
 	for(size_t i = 0; i < CALCULATOR->variables.size(); i++) {
 		if(!CALCULATOR->variables[i]->isActive()) {
 			//deactivated variable
@@ -183,7 +186,7 @@ void generate_variables_tree_struct() {
 				cat_i = cat.find("/"); cat_i_prev = 0;
 				b = false;
 				while(true) {
-					if(cat_i == string::npos) {
+					if(cat_i == std::string::npos) {
 						cat_sub = cat.substr(cat_i_prev, cat.length() - cat_i_prev);
 					} else {
 						cat_sub = cat.substr(cat_i_prev, cat_i - cat_i_prev);
@@ -205,7 +208,7 @@ void generate_variables_tree_struct() {
 						item = &*it;
 						item->item = cat_sub;
 					}
-					if(cat_i == string::npos) {
+					if(cat_i == std::string::npos) {
 						break;
 					}
 					cat_i_prev = cat_i + 1;
@@ -232,13 +235,13 @@ void generate_functions_tree_struct() {
 
 	size_t cat_i, cat_i_prev; 
 	bool b;	
-	string str, cat, cat_sub;
+	std::string str, cat, cat_sub;
 	MathFunction *f = NULL;
 	function_cats.items.clear();
 	function_cats.objects.clear();
 	function_cats.parent = NULL;
 	ia_functions.clear();
-	list<tree_struct>::iterator it;
+	std::list<tree_struct>::iterator it;
 
 	for(size_t i = 0; i < CALCULATOR->functions.size(); i++) {
 		if(!CALCULATOR->functions[i]->isActive()) {
@@ -260,7 +263,7 @@ void generate_functions_tree_struct() {
 				cat_i = cat.find("/"); cat_i_prev = 0;
 				b = false;
 				while(true) {
-					if(cat_i == string::npos) {
+					if(cat_i == std::string::npos) {
 						cat_sub = cat.substr(cat_i_prev, cat.length() - cat_i_prev);
 					} else {
 						cat_sub = cat.substr(cat_i_prev, cat_i - cat_i_prev);
@@ -282,7 +285,7 @@ void generate_functions_tree_struct() {
 						item = &*it;
 						item->item = cat_sub;
 					}
-					if(cat_i == string::npos) {
+					if(cat_i == std::string::npos) {
 						break;
 					}
 					cat_i_prev = cat_i + 1;
diff --git a/src/qalculate_tde_utils.h b/src/qalculate_tde_utils.h
index 05df313..e51d0c1 100644
--- a/src/qalculate_tde_utils.h
+++ b/src/qalculate_tde_utils.h
@@ -21,6 +21,9 @@
 #ifndef QALCULATE_TDE_UTILS_H
 #define QALCULATE_TDE_UTILS_H
 
+#include <vector>
+#include <string>
+#include <list>
 #include <libqalculate/qalculate.h>
 #undef insertItem
 #undef addItem
@@ -34,15 +37,15 @@ class TQLabel;
 class TQLineEdit;
 
 struct tree_struct {
-	string item;
-	list<tree_struct> items;
-	list<tree_struct>::iterator it;
-	list<tree_struct>::reverse_iterator rit;
-	vector<void*> objects;	
+	std::string item;
+	std::list<tree_struct> items;
+	std::list<tree_struct>::iterator it;
+	std::list<tree_struct>::reverse_iterator rit;
+	std::vector<void*> objects;	
 	tree_struct *parent;
 	void sort() {
 		items.sort();
-		for(list<tree_struct>::iterator it = items.begin(); it != items.end(); ++it) {
+		for(std::list<tree_struct>::iterator it = items.begin(); it != items.end(); ++it) {
 			it->sort();
 		}
 	}
diff --git a/src/qalculateconvertnumberbasesdialog.cpp b/src/qalculateconvertnumberbasesdialog.cpp
index 8ff4ba9..88db1a1 100644
--- a/src/qalculateconvertnumberbasesdialog.cpp
+++ b/src/qalculateconvertnumberbasesdialog.cpp
@@ -19,6 +19,7 @@
  ***************************************************************************/
 #include "qalculateconvertnumberbasesdialog.h"
 #include "qalculate_tde_utils.h"
+#include <string>
 #include <tdelocale.h>
 #include <tqgrid.h>
 #include <tqlabel.h>
@@ -59,7 +60,7 @@ QalculateConvertNumberBasesDialog::QalculateConvertNumberBasesDialog(TQWidget *p
 QalculateConvertNumberBasesDialog::~QalculateConvertNumberBasesDialog() {}
 
 void QalculateConvertNumberBasesDialog::setDecimalValue(const TQString &qstr) {
-	string str = qstr.ascii();
+	std::string str = qstr.ascii();
 	remove_blank_ends(str);
 	if(str.empty()) return;
 	if(is_in(OPERATORS EXP, str[str.length() - 1])) return;
@@ -69,7 +70,7 @@ void QalculateConvertNumberBasesDialog::setDecimalValue(const TQString &qstr) {
 	updateEntries(&value, 10);
 }
 void QalculateConvertNumberBasesDialog::setBinaryValue(const TQString &qstr) {
-	string str = qstr.ascii();
+	std::string str = qstr.ascii();
 	remove_blank_ends(str);
 	if(str.empty()) return;
 	if(is_in(OPERATORS EXP, str[str.length() - 1])) return;
@@ -80,7 +81,7 @@ void QalculateConvertNumberBasesDialog::setBinaryValue(const TQString &qstr) {
 	updateEntries(&value, 2);
 }
 void QalculateConvertNumberBasesDialog::setOctalValue(const TQString &qstr) {
-	string str = qstr.ascii();
+	std::string str = qstr.ascii();
 	remove_blank_ends(str);
 	if(str.empty()) return;
 	if(is_in(OPERATORS EXP, str[str.length() - 1])) return;
@@ -91,7 +92,7 @@ void QalculateConvertNumberBasesDialog::setOctalValue(const TQString &qstr) {
 	updateEntries(&value, 8);
 }
 void QalculateConvertNumberBasesDialog::setHexadecimalValue(const TQString &qstr) {
-	string str = qstr.ascii();
+	std::string str = qstr.ascii();
 	remove_blank_ends(str);
 	if(str.empty()) return;
 	if(is_in(OPERATORS EXP, str[str.length() - 1])) return;
diff --git a/src/qalculateconvertunitsdialog.cpp b/src/qalculateconvertunitsdialog.cpp
index 25336c4..dde95c3 100644
--- a/src/qalculateconvertunitsdialog.cpp
+++ b/src/qalculateconvertunitsdialog.cpp
@@ -20,6 +20,8 @@
 #include "qalculateconvertunitsdialog.h"
 #include "qalculate_tde_utils.h"
 
+#include <vector>
+#include <string>
 #include <tqlabel.h>
 #include <klineedit.h>
 #include <tdelocale.h>
@@ -34,7 +36,7 @@
 #include <tqsplitter.h>
 
 extern tree_struct unit_cats;
-extern vector<void*> ia_units;
+extern std::vector<void*> ia_units;
 extern PrintOptions printops;
 extern EvaluationOptions evalops;
 
@@ -183,7 +185,7 @@ void QalculateConvertUnitsDialog::categorySelected() {
 		no_cat = true;
 	}
 	if(!b_all && !no_cat && selected_category[0] == '/') {
-		string str = selected_category.ascii();
+		std::string str = selected_category.ascii();
 		str.erase(str.begin());
 		for(size_t i = 0; i < CALCULATOR->units.size(); i++) {
 			if(CALCULATOR->units[i]->isActive() && !CALCULATOR->units[i]->isHidden() && CALCULATOR->units[i]->category().substr(0, selected_category.length() - 1) == str) {
@@ -191,7 +193,7 @@ void QalculateConvertUnitsDialog::categorySelected() {
 			}
 		}
 	} else {
-		string str = selected_category.ascii();
+		std::string str = selected_category.ascii();
 		for(size_t i = 0; i < CALCULATOR->units.size(); i++) {
 			if(CALCULATOR->units[i]->isActive() && !CALCULATOR->units[i]->isHidden() && (b_all || (no_cat && CALCULATOR->units[i]->category().empty()) || CALCULATOR->units[i]->category() == str)) {
 				addUnitTreeItem(CALCULATOR->units[i]);
diff --git a/src/qalculateeditdataobjectdialog.cpp b/src/qalculateeditdataobjectdialog.cpp
index df63409..612b19c 100644
--- a/src/qalculateeditdataobjectdialog.cpp
+++ b/src/qalculateeditdataobjectdialog.cpp
@@ -19,6 +19,7 @@
  ***************************************************************************/
 #include "qalculateeditdataobjectdialog.h"
 #include "qalculate_tde_utils.h"
+#include <string>
 #include <tqlabel.h>
 #include <tqgrid.h>
 #include <klineedit.h>
@@ -51,10 +52,10 @@ DataObject *QalculateEditDataObjectDialog::editDataObject(DataSet *ds, DataObjec
 	new TQLabel(i18n("Approximation"), grid);
 	DataPropertyIter it;
 	DataProperty *dp = ds->getFirstProperty(&it);
-	string sval;
+	std::string sval;
 	TQValueVector<KLineEdit*> value_entries;
 	TQValueVector<KComboBox*> approx_menus;
-	string str;
+	std::string str;
 	while(dp) {
 		new TQLabel(dp->title().c_str(), grid);
 		KLineEdit *entry = new KLineEdit(grid);
diff --git a/src/qalculateeditdatasetdialog.cpp b/src/qalculateeditdatasetdialog.cpp
index e543368..a7dc88a 100644
--- a/src/qalculateeditdatasetdialog.cpp
+++ b/src/qalculateeditdatasetdialog.cpp
@@ -21,6 +21,7 @@
 #include "qalculate_tde_utils.h"
 #include "qalculateeditnamesdialog.h"
 
+#include <string>
 #include <tqgrid.h>
 #include <klineedit.h>
 #include <kpushbutton.h>
@@ -204,7 +205,7 @@ void QalculateEditDataSetDialog::updateDatasetPropertyList() {
 
 void QalculateEditDataSetDialog::slotOk() {
 
-	string str = nameEdit->text().ascii();
+	std::string str = nameEdit->text().ascii();
 	remove_blank_ends(str);
 	if(str.empty() && (!names_edit_dialog || names_edit_dialog->isEmpty())) {
 		//no name -- open dialog again
@@ -491,7 +492,7 @@ QalculateEditDataPropertyDialog::~QalculateEditDataPropertyDialog() {}
 
 void QalculateEditDataPropertyDialog::slotOk() {
 
-	string str = nameEdit->text().ascii();
+	std::string str = nameEdit->text().ascii();
 	remove_blank_ends(str);
 	if(str.empty() && (!names_edit_dialog || names_edit_dialog->isEmpty())) {
 		//no name -- open dialog again
diff --git a/src/qalculateeditfunctiondialog.cpp b/src/qalculateeditfunctiondialog.cpp
index 82dd579..0912b2b 100644
--- a/src/qalculateeditfunctiondialog.cpp
+++ b/src/qalculateeditfunctiondialog.cpp
@@ -21,6 +21,7 @@
 #include "qalculate_tde_utils.h"
 #include "qalculateeditnamesdialog.h"
 
+#include <string>
 #include <tqgrid.h>
 #include <klineedit.h>
 #include <kpushbutton.h>
@@ -178,9 +179,9 @@ void QalculateEditFunctionDialog::argumentRenamed(TQListViewItem *i, const TQStr
 
 void QalculateEditFunctionDialog::slotOk() {
 
-	string str = nameEdit->text().ascii();
+	std::string str = nameEdit->text().ascii();
 	remove_blank_ends(str);
-	string str2 = CALCULATOR->unlocalizeExpression(expressionEdit->text().ascii(), evalops.parse_options);
+	std::string str2 = CALCULATOR->unlocalizeExpression(expressionEdit->text().ascii(), evalops.parse_options);
 	remove_blank_ends(str2);
 	gsub("\n", " ", str2);
 	if(str.empty() && (!names_edit_dialog || names_edit_dialog->isEmpty())) {
diff --git a/src/qalculateeditmatrixvectordialog.cpp b/src/qalculateeditmatrixvectordialog.cpp
index 578f06b..1a65a48 100644
--- a/src/qalculateeditmatrixvectordialog.cpp
+++ b/src/qalculateeditmatrixvectordialog.cpp
@@ -21,6 +21,7 @@
 #include "qalculate_tde_utils.h"
 #include "qalculateeditnamesdialog.h"
 
+#include <string>
 #include <tqgrid.h>
 #include <klineedit.h>
 #include <tqpushbutton.h>
@@ -177,7 +178,7 @@ KnownVariable *QalculateEditMatrixVectorDialog::newMatrix(TQString category) {
 }
 
 void QalculateEditMatrixVectorDialog::slotOk() {
-	string str = nameEdit->text().ascii();
+	std::string str = nameEdit->text().ascii();
 	remove_blank_ends(str);
 	if(str.empty() && (!names_edit_dialog || names_edit_dialog->isEmpty())) {
 		//no name -- open dialog again
@@ -202,7 +203,7 @@ void QalculateEditMatrixVectorDialog::slotOk() {
 		int c = columnsBox->value();
 		if(vectorButton->isChecked()) {
 			mstruct_new.clearVector();
-			string str2;
+			std::string str2;
 			for(int index_r = 0; index_r < r; index_r++) {
 				for(int index_c = 0; index_c < c; index_c++) {
 					if(!elementsTable->text(index_r, index_c).isEmpty()) {
diff --git a/src/qalculateeditunitdialog.cpp b/src/qalculateeditunitdialog.cpp
index b678b10..1c3d361 100644
--- a/src/qalculateeditunitdialog.cpp
+++ b/src/qalculateeditunitdialog.cpp
@@ -21,6 +21,7 @@
 #include "qalculate_tde_utils.h"
 #include "qalculateeditnamesdialog.h"
 
+#include <string>
 #include <tqgrid.h>
 #include <klineedit.h>
 #include <tqpushbutton.h>
@@ -138,7 +139,7 @@ void QalculateEditUnitDialog::slotHelp() {
 }
 void QalculateEditUnitDialog::slotOk() {
 
-	string str = nameEdit->text().ascii();
+	std::string str = nameEdit->text().ascii();
 	remove_blank_ends(str);
 	if(str.empty() && (!names_edit_dialog || names_edit_dialog->isEmpty())) {
 		//no name -- open dialog again
diff --git a/src/qalculateeditunknownvariabledialog.cpp b/src/qalculateeditunknownvariabledialog.cpp
index 15ca74a..d8ad09d 100644
--- a/src/qalculateeditunknownvariabledialog.cpp
+++ b/src/qalculateeditunknownvariabledialog.cpp
@@ -21,6 +21,7 @@
 #include "qalculate_tde_utils.h"
 #include "qalculateeditnamesdialog.h"
 
+#include <string>
 #include <tqgrid.h>
 #include <klineedit.h>
 #include <tqpushbutton.h>
@@ -124,7 +125,7 @@ void QalculateEditUnknownVariableDialog::slotHelp() {
 }
 void QalculateEditUnknownVariableDialog::slotOk() {
 
-	string str = nameEdit->text().ascii();
+	std::string str = nameEdit->text().ascii();
 	remove_blank_ends(str);
 	if(str.empty() && (!names_edit_dialog || names_edit_dialog->isEmpty())) {
 		//no name -- open dialog again
diff --git a/src/qalculateeditvariabledialog.cpp b/src/qalculateeditvariabledialog.cpp
index aab9af3..8475cdd 100644
--- a/src/qalculateeditvariabledialog.cpp
+++ b/src/qalculateeditvariabledialog.cpp
@@ -21,6 +21,7 @@
 #include "qalculate_tde_utils.h"
 #include "qalculateeditnamesdialog.h"
 
+#include <string>
 #include <tqgrid.h>
 #include <klineedit.h>
 #include <tqpushbutton.h>
@@ -94,7 +95,7 @@ void QalculateEditVariableDialog::slotHelp() {
 }
 
 void QalculateEditVariableDialog::slotOk() {
-	string str = nameEdit->text().ascii();
+	std::string str = nameEdit->text().ascii();
 	remove_blank_ends(str);
 	if(str.empty() && (!names_edit_dialog || names_edit_dialog->isEmpty())) {
 		//no name -- open dialog again
@@ -102,7 +103,7 @@ void QalculateEditVariableDialog::slotOk() {
 		KMessageBox::error(this, i18n("Empty name field"));
 		return;
 	}
-	string str2 = valueEdit->text().ascii();
+	std::string str2 = valueEdit->text().ascii();
 	remove_blank_ends(str2);
 	if(!(init_value && force_init_value) && str2.empty()) {
 		//no value -- open dialog again
diff --git a/src/qalculateexportcsvdialog.cpp b/src/qalculateexportcsvdialog.cpp
index 9c73297..a224ee8 100644
--- a/src/qalculateexportcsvdialog.cpp
+++ b/src/qalculateexportcsvdialog.cpp
@@ -20,6 +20,7 @@
 #include "qalculateexportcsvdialog.h"
 #include "qalculate_tde_utils.h"
 
+#include <string>
 #include <tqlayout.h>
 #include <kurlrequester.h>
 #include <klineedit.h>
@@ -93,7 +94,7 @@ void QalculateExportCSVDialog::slotOk() {
 		KMessageBox::error(this, i18n("No file name entered."));
 		return;
 	}
-	string delimiter = "";
+	std::string delimiter = "";
 	switch(delimiterCombo->currentItem()) {
 		case 0: {
 			delimiter = ",";
@@ -128,7 +129,7 @@ void QalculateExportCSVDialog::slotOk() {
 	} else if(currentResultButton->isChecked()) {
 		matrix_struct = mstruct;
 	} else {
-		string str2 = matrixVectorEdit->text().ascii();
+		std::string str2 = matrixVectorEdit->text().ascii();
 		remove_blank_ends(str2);
 		if(str2.empty()) {
 			matrixVectorEdit->setFocus();
diff --git a/src/qalculateexpressionedit.cpp b/src/qalculateexpressionedit.cpp
index 31ccecf..3eff804 100644
--- a/src/qalculateexpressionedit.cpp
+++ b/src/qalculateexpressionedit.cpp
@@ -21,6 +21,8 @@
 
 #include "qalculate_tde_utils.h"
 #include "kqalculate.h"
+#include <vector>
+#include <string>
 #include <tdeversion.h>
 #include <kcursor.h>
 #include <tqstyle.h>
@@ -35,14 +37,14 @@
 #include <tdelocale.h>
 #include <tqsimplerichtext.h>
 
-extern vector<mode_struct> modes;
+extern std::vector<mode_struct> modes;
 
 extern KQalculate *mainWin;
 extern PrintOptions printops;
 extern EvaluationOptions evalops;
 extern bool rpn_mode, rpn_keypad_only;
 extern tree_struct function_cats, unit_cats, variable_cats;
-extern vector<void*> ia_units, ia_variables, ia_functions;
+extern std::vector<void*> ia_units, ia_variables, ia_functions;
 
 class QalculateExpressionEditListBoxItem : public TQListBoxItem {
 
@@ -726,11 +728,11 @@ void set_title(ExpressionItem *item, TQString &title) {
 	}
 }
 
-string sub_suffix(const ExpressionName *ename) {
+std::string sub_suffix(const ExpressionName *ename) {
 	size_t i = ename->name.rfind('_');
-	bool b = i == string::npos || i == ename->name.length() - 1 || i == 0;
+	bool b = i == std::string::npos || i == ename->name.length() - 1 || i == 0;
 	size_t i2 = 1;
-	string str;
+	std::string str;
 	if(b) {
 		if(is_in(NUMBERS, ename->name[ename->name.length() - 1])) {
 			while(ename->name.length() > i2 + 1 && is_in(NUMBERS, ename->name[ename->name.length() - 1 - i2])) {
@@ -749,7 +751,7 @@ string sub_suffix(const ExpressionName *ename) {
 }
 
 TQString makeListName(ExpressionItem *item, TQWidget *w, int *italic_index, bool *rich_text) {
-	string str;
+	std::string str;
 	const ExpressionName *ename, *ename_r;
 	*rich_text = false;
 	bool b = false;
diff --git a/src/qalculatefunctionsdialog.cpp b/src/qalculatefunctionsdialog.cpp
index 4bb53bf..d60c9be 100644
--- a/src/qalculatefunctionsdialog.cpp
+++ b/src/qalculatefunctionsdialog.cpp
@@ -20,6 +20,8 @@
 #include "qalculatefunctionsdialog.h"
 #include "qalculate_tde_utils.h"
 #include "qalculateeditfunctiondialog.h"
+#include <vector>
+#include <string>
 #include <kpushbutton.h>
 #include <tqsplitter.h>
 #include <tqvbox.h>
@@ -33,7 +35,7 @@
 #include <kstdguiitem.h>
 
 extern tree_struct function_cats;
-extern vector<void*> ia_functions;
+extern std::vector<void*> ia_functions;
 extern PrintOptions printops;
 
 QalculateFunctionsDialog::QalculateFunctionsDialog(TQWidget *parent, const char *name) : KDialog(parent, name, false) {
@@ -510,7 +512,7 @@ void QalculateFunctionsDialog::categorySelected() {
 		b_inactive = true;
 	}
 	if(!b_all && !no_cat && !b_inactive && selected_category[0] == '/') {
-		string str = selected_category.ascii();
+		std::string str = selected_category.ascii();
 		str.erase(str.begin());
 		for(size_t i = 0; i < CALCULATOR->functions.size(); i++) {
 			if(CALCULATOR->functions[i]->isActive() && CALCULATOR->functions[i]->category().substr(0, selected_category.length() - 1) == str) {
@@ -518,7 +520,7 @@ void QalculateFunctionsDialog::categorySelected() {
 			}
 		}
 	} else {
-		string str = selected_category.ascii();
+		std::string str = selected_category.ascii();
 		for(size_t i = 0; i < CALCULATOR->functions.size(); i++) {
 			if((b_inactive && !CALCULATOR->functions[i]->isActive()) || (CALCULATOR->functions[i]->isActive() && (b_all || (no_cat && CALCULATOR->functions[i]->category().empty()) || (!b_inactive && CALCULATOR->functions[i]->category() == str)))) {
 				addFunctionTreeItem(CALCULATOR->functions[i]);
diff --git a/src/qalculateimportcsvdialog.cpp b/src/qalculateimportcsvdialog.cpp
index 2a6e257..251adc9 100644
--- a/src/qalculateimportcsvdialog.cpp
+++ b/src/qalculateimportcsvdialog.cpp
@@ -20,6 +20,7 @@
 #include "qalculateimportcsvdialog.h"
 #include "qalculate_tde_utils.h"
 
+#include <string>
 #include <tqlayout.h>
 #include <kurlrequester.h>
 #include <klineedit.h>
@@ -116,7 +117,7 @@ void QalculateImportCSVDialog::slotOk() {
 		KMessageBox::error(this, i18n("No file name entered."));
 		return;
 	}
-	string delimiter = "";
+	std::string delimiter = "";
 	switch(delimiterCombo->currentItem()) {
 		case 0: {
 			delimiter = ",";
diff --git a/src/qalculateplotdialog.cpp b/src/qalculateplotdialog.cpp
index 6755bed..6c0a61b 100644
--- a/src/qalculateplotdialog.cpp
+++ b/src/qalculateplotdialog.cpp
@@ -20,6 +20,8 @@
 #include "qalculateplotdialog.h"
 #include "qalculateexpressionedit.h"
 
+#include <vector>
+#include <string>
 #include <klineedit.h>
 #include <kpushbutton.h>
 #include <kcombobox.h>
@@ -587,7 +589,7 @@ void QalculatePlotDialog::applyAppearance() {
 	updatePlot();
 }
 
-bool QalculatePlotDialog::generatePlot(PlotParameters &pp, vector<MathStructure> &y_vectors, vector<MathStructure> &x_vectors, vector<PlotDataParameters*> &pdps) {
+bool QalculatePlotDialog::generatePlot(PlotParameters &pp, std::vector<MathStructure> &y_vectors, std::vector<MathStructure> &x_vectors, std::vector<PlotDataParameters*> &pdps) {
 	TQListViewItemIterator it(seriesView);
 	if(!it.current()) {
 		return false;
@@ -736,9 +738,9 @@ void QalculatePlotDialog::savePlot() {
 			}
 		}
 	}
-	vector<MathStructure> y_vectors;
-	vector<MathStructure> x_vectors;
-	vector<PlotDataParameters*> pdps;
+	std::vector<MathStructure> y_vectors;
+	std::vector<MathStructure> x_vectors;
+	std::vector<PlotDataParameters*> pdps;
 	PlotParameters pp;
 	if(generatePlot(pp, y_vectors, x_vectors, pdps)) {
 		pp.filename = filename.ascii();
@@ -750,9 +752,9 @@ void QalculatePlotDialog::savePlot() {
 	}
 }
 void QalculatePlotDialog::updatePlot() {
-	vector<MathStructure> y_vectors;
-	vector<MathStructure> x_vectors;
-	vector<PlotDataParameters*> pdps;
+	std::vector<MathStructure> y_vectors;
+	std::vector<MathStructure> x_vectors;
+	std::vector<PlotDataParameters*> pdps;
 	PlotParameters pp;
 	if(!generatePlot(pp, y_vectors, x_vectors, pdps)) {
 		CALCULATOR->closeGnuplot();
@@ -765,7 +767,7 @@ void QalculatePlotDialog::updatePlot() {
 		if(pdps[i]) delete pdps[i];
 	}
 }
-void QalculatePlotDialog::generatePlotSeries(MathStructure **x_vector, MathStructure **y_vector, int type, string str, string str_x) {
+void QalculatePlotDialog::generatePlotSeries(MathStructure **x_vector, MathStructure **y_vector, int type, std::string str, std::string str_x) {
 	EvaluationOptions eo;
 	eo.approximation = APPROXIMATION_APPROXIMATE;
 	eo.parse_options = evalops.parse_options;
diff --git a/src/qalculateplotdialog.h b/src/qalculateplotdialog.h
index 4d8e9b8..c35ac53 100644
--- a/src/qalculateplotdialog.h
+++ b/src/qalculateplotdialog.h
@@ -20,6 +20,8 @@
 #ifndef QALCULATEPLOTDIALOG_H
 #define QALCULATEPLOTDIALOG_H
 
+#include <vector>
+#include <string>
 #include <kdialogbase.h>
 #include <tqmap.h>
 #include <tqstring.h>
@@ -63,8 +65,8 @@ public:
 	TQTabWidget *tabs;
 	TDEListView *seriesView;
 
-	bool generatePlot(PlotParameters &pp, vector<MathStructure> &y_vectors, vector<MathStructure> &x_vectors, vector<PlotDataParameters*> &pdps);
-	void generatePlotSeries(MathStructure **x_vector, MathStructure **y_vector, int type, string str, string str_x);
+	bool generatePlot(PlotParameters &pp, std::vector<MathStructure> &y_vectors, std::vector<MathStructure> &x_vectors, std::vector<PlotDataParameters*> &pdps);
+	void generatePlotSeries(MathStructure **x_vector, MathStructure **y_vector, int type, std::string str, std::string str_x);
 
 	TQMap<TQListViewItem*, int> itemStyle;
 	TQMap<TQListViewItem*, int> itemSmoothing;
diff --git a/src/qalculateresultdisplay.cpp b/src/qalculateresultdisplay.cpp
index aea41fa..0c7ccdf 100644
--- a/src/qalculateresultdisplay.cpp
+++ b/src/qalculateresultdisplay.cpp
@@ -21,6 +21,7 @@
 
 #include "qalculate_tde_utils.h"
 #include "kqalculate.h"
+#include <vector>
 #include <tdepopupmenu.h>
 #include <kxmlguifactory.h>
 #include <kxmlguiclient.h>
@@ -32,7 +33,7 @@
 #include <tdeapplication.h>
 #include <tqsimplerichtext.h>
 
-extern vector<mode_struct> modes;
+extern std::vector<mode_struct> modes;
 
 extern TQString parsed_text;
 extern KQalculate *mainWin;
diff --git a/src/qalculateunitsdialog.cpp b/src/qalculateunitsdialog.cpp
index 8710f2f..c5c74e1 100644
--- a/src/qalculateunitsdialog.cpp
+++ b/src/qalculateunitsdialog.cpp
@@ -20,6 +20,8 @@
 #include "qalculateunitsdialog.h"
 #include "qalculate_tde_utils.h"
 #include "qalculateeditunitdialog.h"
+#include <vector>
+#include <string>
 #include <kpushbutton.h>
 #include <tqsplitter.h>
 #include <tqvbox.h>
@@ -37,7 +39,7 @@
 #include <kstdguiitem.h>
 
 extern tree_struct unit_cats;
-extern vector<void*> ia_units;
+extern std::vector<void*> ia_units;
 extern PrintOptions printops;
 extern EvaluationOptions evalops;
 
@@ -421,7 +423,7 @@ void QalculateUnitsDialog::categorySelected() {
 		b_inactive = true;
 	}
 	if(!b_all && !no_cat && !b_inactive && selected_category[0] == '/') {
-		string str = selected_category.ascii();
+		std::string str = selected_category.ascii();
 		str.erase(str.begin());
 		for(size_t i = 0; i < CALCULATOR->units.size(); i++) {
 			if(CALCULATOR->units[i]->isActive() && CALCULATOR->units[i]->category().substr(0, selected_category.length() - 1) == str) {
@@ -429,7 +431,7 @@ void QalculateUnitsDialog::categorySelected() {
 			}
 		}
 	} else {
-		string str = selected_category.ascii();
+		std::string str = selected_category.ascii();
 		for(size_t i = 0; i < CALCULATOR->units.size(); i++) {
 			if((b_inactive && !CALCULATOR->units[i]->isActive()) || (CALCULATOR->units[i]->isActive() && (b_all || (no_cat && CALCULATOR->units[i]->category().empty()) || (!b_inactive && CALCULATOR->units[i]->category() == str)))) {
 				addUnitTreeItem(CALCULATOR->units[i]);
diff --git a/src/qalculatevariablesdialog.cpp b/src/qalculatevariablesdialog.cpp
index 57e07ea..86ec001 100644
--- a/src/qalculatevariablesdialog.cpp
+++ b/src/qalculatevariablesdialog.cpp
@@ -23,6 +23,8 @@
 #include "qalculateeditmatrixvectordialog.h"
 #include "qalculateeditunknownvariabledialog.h"
 #include "qalculateexportcsvdialog.h"
+#include <vector>
+#include <string>
 #include <kpushbutton.h>
 #include <tqsplitter.h>
 #include <tqvbox.h>
@@ -35,7 +37,7 @@
 #include <kstdguiitem.h>
 
 extern tree_struct variable_cats;
-extern vector<void*> ia_variables;
+extern std::vector<void*> ia_variables;
 
 QalculateVariablesDialog::QalculateVariablesDialog(TQWidget *parent, const char *name) : KDialog(parent, name, false) {
 
@@ -467,7 +469,7 @@ void QalculateVariablesDialog::categorySelected() {
 		b_inactive = true;
 	}
 	if(!b_all && !no_cat && !b_inactive && selected_category[0] == '/') {
-		string str = selected_category.ascii();
+		std::string str = selected_category.ascii();
 		str.erase(str.begin());
 		for(size_t i = 0; i < CALCULATOR->variables.size(); i++) {
 			if(CALCULATOR->variables[i]->isActive() && CALCULATOR->variables[i]->category().substr(0, selected_category.length() - 1) == str) {
@@ -475,7 +477,7 @@ void QalculateVariablesDialog::categorySelected() {
 			}
 		}
 	} else {
-		string str = selected_category.ascii();
+		std::string str = selected_category.ascii();
 		for(size_t i = 0; i < CALCULATOR->variables.size(); i++) {
 			if((b_inactive && !CALCULATOR->variables[i]->isActive()) || (CALCULATOR->variables[i]->isActive() && (b_all || (no_cat && CALCULATOR->variables[i]->category().empty()) || (!b_inactive && CALCULATOR->variables[i]->category() == str)))) {
 				addVariableTreeItem(CALCULATOR->variables[i]);