C++ Archives - CodeBind.com

How to Install OpenCV in Ubuntu 16.04 LTS for C or Cpp

How to Install OpenCV in Ubuntu 18.04 LTS for C / C++ (Linux)

May 6, 2018 admin 6

In this post we will see How to Install OpenCV in Ubuntu for C/C++ OpenCV is an image processing library […]

SQLite C/C++- CREATE Table in SQLite Database using C/C++

March 7, 2018 admin 1

SQLite C/C++ – CREATE Table in SQLite Database using C/C++ SQLite C/C++- CREATE Table in SQLite Database using C/C++ […]

SQLite C/C++- CREATE and OPEN SQLite Database using C/C++

March 7, 2018 admin 0

SQLite C/C++- CREATE and OPEN SQLite Database using C/C++ Make a C Program file and Name it as main.c […]

How to Install OpenCV in Ubuntu 16.04 LTS for C / C++

July 28, 2017 admin 38

In this post we will see How to Install OpenCV in Ubuntu for C/C++ OpenCV is an image processing library […]

How To install MinGW on Windows 10 (GCC & G++)

December 6, 2016 admin 3

MinGW, a contraction of “Minimalist GNU for Windows”, is a minimalist development environment for native Microsoft Windows applications. Downloading MinGW open […]

Qt Tutorials For Beginners – Simple Notepad Application

December 1, 2016 admin 0

qt notepad design QtNotepadDemo.pro

#-------------------------------------------------
#
# Project created by QtCreator 2016-05-26T17:28:11
#
#-------------------------------------------------

QT       += core gui printsupport

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = QtNotepadDemo
TEMPLATE = app


SOURCES += main.cpp\
        mainwindow.cpp

HEADERS  += mainwindow.h

FORMS    += mainwindow.ui

RESOURCES += \
    resource.qrc

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

#-------------------------------------------------

#

# Project created by QtCreator 2016-05-26T17:28:11

#

#-------------------------------------------------

QT += core gui printsupport

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = QtNotepadDemo

TEMPLATE = app

SOURCES += main.cpp\

mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui

RESOURCES += \

resource.qrc

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void on_actionNew_triggered();

    void on_actionCopy_triggered();

    void on_actionOpen_triggered();

    void on_actionSave_triggered();

    void on_actionSave_as_triggered();

    void on_actionCut_triggered();

    void on_actionPaste_triggered();

    void on_actionRedo_triggered();

    void on_actionUndo_triggered();

    void on_actionAbout_Notepad_triggered();

    void on_actionFont_triggered();

    void on_actionColor_triggered();

    void on_actionBackground_Color_triggered();

    void on_actionBackgroung_Color_Edit_Text_triggered();

    void on_actionPrint_triggered();

private:
    Ui::MainWindow *ui;
    QString file_path_;
};

#endif // MAINWINDOW_H

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

#ifndef MAINWINDOW_H

#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {

class MainWindow;

}

class MainWindow : public QMainWindow

{

Q_OBJECT

public:

explicit MainWindow(QWidget *parent = 0);

~MainWindow();

private slots:

void on_actionNew_triggered();

void on_actionCopy_triggered();

void on_actionOpen_triggered();

void on_actionSave_triggered();

void on_actionSave_as_triggered();

void on_actionCut_triggered();

void on_actionPaste_triggered();

void on_actionRedo_triggered();

void on_actionUndo_triggered();

void on_actionAbout_Notepad_triggered();

void on_actionFont_triggered();

void on_actionColor_triggered();

void on_actionBackground_Color_triggered();

void on_actionBackgroung_Color_Edit_Text_triggered();

void on_actionPrint_triggered();

private:

Ui::MainWindow *ui;

QString file_path_;

};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QFile>
#include <QFileDialog>
#include <QTextStream>
#include <QMessageBox>
#include <QFontDialog>
#include <QFont>
#include <QColorDialog>
#include <QColor>
#include <QPrinter>
#include <QPrintDialog>
MainWindow::MainWindow(QWidget *parent) :
  QMainWindow(parent),
  ui(new Ui::MainWindow)
{
  ui->setupUi(this);
  this->setCentralWidget(ui->textEdit);
}

MainWindow::~MainWindow()
{
  delete ui;
}

void MainWindow::on_actionNew_triggered()
{
  file_path_ = "";
  ui->textEdit->setText("");
}

void MainWindow::on_actionCopy_triggered()
{
  ui->textEdit->copy();
}

void MainWindow::on_actionOpen_triggered()
{
  QString file_name = QFileDialog::getOpenFileName(this,"Open the file");
  QFile file(file_name);
  file_path_ = file_name;
  if(!file.open(QFile::ReadOnly | QFile::Text)) {
      QMessageBox::warning(this,"..","file not open");
      return;
    }
  QTextStream in(&file);
  QString text = in.readAll();
  ui->textEdit->setText(text);
  file.close();
}

void MainWindow::on_actionSave_triggered()
{

  QFile file(file_path_);
  if(!file.open(QFile::WriteOnly | QFile::Text)) {
      QMessageBox::warning(this,"..","file not open");
      return;
    }
  QTextStream out(&file);
  QString text = ui->textEdit->toPlainText();
  out << text;
  file.flush();
  file.close();
}

void MainWindow::on_actionSave_as_triggered()
{
  QString file_name = QFileDialog::getSaveFileName(this,"Open the file");
  QFile file(file_name);
  file_path_ = file_name;
  if(!file.open(QFile::WriteOnly | QFile::Text)) {
      QMessageBox::warning(this,"..","file not open");
      return;
    }
  QTextStream out(&file);
  QString text = ui->textEdit->toPlainText();
  out << text;
  file.flush();
  file.close();
}

void MainWindow::on_actionCut_triggered()
{
  ui->textEdit->cut();
}

void MainWindow::on_actionPaste_triggered()
{
  ui->textEdit->paste();
}

void MainWindow::on_actionRedo_triggered()
{
  ui->textEdit->redo();
}

void MainWindow::on_actionUndo_triggered()
{
  ui->textEdit->undo();
}

void MainWindow::on_actionAbout_Notepad_triggered()
{
  QString about_text;
  about_text  = "Auther : somebody\n";
  about_text += "Date   : 12/05/2016\n";
  about_text += "(C) Notepad  (R)\n";

  QMessageBox::about(this,"About Notepad",about_text);
}

void MainWindow::on_actionFont_triggered()
{
  bool ok;
  QFont font = QFontDialog::getFont(&ok, this);
  if (ok) {
      ui->textEdit->setFont(font);
    } else return;

}

void MainWindow::on_actionColor_triggered()
{
  QColor color = QColorDialog::getColor(Qt::white,this,"Choose Color");
  if(color.isValid()) {
      ui->textEdit->setTextColor(color);
    }
}

void MainWindow::on_actionBackground_Color_triggered()
{
  QColor color = QColorDialog::getColor(Qt::white,this,"Choose Color");
  if(color.isValid()) {
      ui->textEdit->setTextBackgroundColor(color);
    }
}

void MainWindow::on_actionBackgroung_Color_Edit_Text_triggered()
{
  QColor color = QColorDialog::getColor(Qt::white,this,"Choose Color");
  if(color.isValid()) {
      ui->textEdit->setPalette(QPalette(color));
    }
}

void MainWindow::on_actionPrint_triggered()
{
  QPrinter printer;
  printer.setPrinterName("desierd printer name");
  QPrintDialog dialog(&printer,this);
  if(dialog.exec() == QDialog::Rejected) return;
  ui->textEdit->print(&printer);
}

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QFile>

#include <QFileDialog>

#include <QTextStream>

#include <QMessageBox>

#include <QFontDialog>

#include <QFont>

#include <QColorDialog>

#include <QColor>

#include <QPrinter>

#include <QPrintDialog>

MainWindow::MainWindow(QWidget *parent) :

QMainWindow(parent),

ui(new Ui::MainWindow)

{

ui->setupUi(this);

this->setCentralWidget(ui->textEdit);

}

MainWindow::~MainWindow()

{

delete ui;

}

void MainWindow::on_actionNew_triggered()

{

file_path_ = "";

ui->textEdit->setText("");

}

void MainWindow::on_actionCopy_triggered()

{

ui->textEdit->copy();

}

void MainWindow::on_actionOpen_triggered()

{

QString file_name = QFileDialog::getOpenFileName(this,"Open the file");

QFile file(file_name);

file_path_ = file_name;

if(!file.open(QFile::ReadOnly | QFile::Text)) {

QMessageBox::warning(this,"..","file not open");

return;

}

QTextStream in(&file);

QString text = in.readAll();

ui->textEdit->setText(text);

file.close();

}

void MainWindow::on_actionSave_triggered()

{

QFile file(file_path_);

if(!file.open(QFile::WriteOnly | QFile::Text)) {

QMessageBox::warning(this,"..","file not open");

return;

}

QTextStream out(&file);

QString text = ui->textEdit->toPlainText();

out << text;

file.flush();

file.close();

}

void MainWindow::on_actionSave_as_triggered()

{

QString file_name = QFileDialog::getSaveFileName(this,"Open the file");

QFile file(file_name);

file_path_ = file_name;

if(!file.open(QFile::WriteOnly | QFile::Text)) {

QMessageBox::warning(this,"..","file not open");

return;

}

QTextStream out(&file);

QString text = ui->textEdit->toPlainText();

out << text;

file.flush();

file.close();

}

void MainWindow::on_actionCut_triggered()

{

ui->textEdit->cut();

}

void MainWindow::on_actionPaste_triggered()

{

ui->textEdit->paste();

}

void MainWindow::on_actionRedo_triggered()

{

ui->textEdit->redo();

}

void MainWindow::on_actionUndo_triggered()

{

ui->textEdit->undo();

}

void MainWindow::on_actionAbout_Notepad_triggered()

{

QString about_text;

about_text = "Auther : somebody\n";

about_text += "Date : 12/05/2016\n";

about_text += "(C) Notepad (R)\n";

QMessageBox::about(this,"About Notepad",about_text);

}

void MainWindow::on_actionFont_triggered()

{

bool ok;

QFont font = QFontDialog::getFont(&ok, this);

if (ok) {

ui->textEdit->setFont(font);

} else return;

}

void MainWindow::on_actionColor_triggered()

{

QColor color = QColorDialog::getColor(Qt::white,this,"Choose Color");

if(color.isValid()) {

ui->textEdit->setTextColor(color);

}

void MainWindow::on_actionBackground_Color_triggered()

{

QColor color = QColorDialog::getColor(Qt::white,this,"Choose Color");

if(color.isValid()) {

ui->textEdit->setTextBackgroundColor(color);

}

void MainWindow::on_actionBackgroung_Color_Edit_Text_triggered()

{

QColor color = QColorDialog::getColor(Qt::white,this,"Choose Color");

if(color.isValid()) {

ui->textEdit->setPalette(QPalette(color));

}

void MainWindow::on_actionPrint_triggered()

{

QPrinter printer;

printer.setPrinterName("desierd printer name");

QPrintDialog dialog(&printer,this);

if(dialog.exec() == QDialog::Rejected) return;

ui->textEdit->print(&printer);

}

main.cpp

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
  QApplication a(argc, argv);
  MainWindow w;
  w.show();

  return a.exec();
}

1

2

3

4

5

6

7

8

9

10

11

#include "mainwindow.h"

#include <QApplication>

int main(int argc, char *argv[])

{

QApplication a(argc, argv);

MainWindow w;

w.show();

return a.exec();

}

mainwindow.ui

<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
 <class>MainWindow</class>
 <widget class="QMainWindow" name="MainWindow">
  <property name="geometry">
   <rect>
    <x>0</x>
    <y>0</y>
    <width>513</width>
    <height>361</height>
   </rect>
  </property>
  <property name="windowTitle">
   <string>MainWindow</string>
  </property>
  <widget class="QWidget" name="centralWidget">
   <layout class="QHBoxLayout" name="horizontalLayout">
    <item>
     <widget class="QTextEdit" name="textEdit"/>
    </item>
   </layout>
  </widget>
  <widget class="QMenuBar" name="menuBar">
   <property name="geometry">
    <rect>
     <x>0</x>
     <y>0</y>
     <width>513</width>
     <height>21</height>
    </rect>
   </property>
   <widget class="QMenu" name="menuFile">
    <property name="title">
     <string>File</string>
    </property>
    <addaction name="actionNew"/>
    <addaction name="actionOpen"/>
    <addaction name="separator"/>
    <addaction name="actionSave"/>
    <addaction name="actionSave_as"/>
    <addaction name="separator"/>
    <addaction name="actionPrint"/>
   </widget>
   <widget class="QMenu" name="menuEdit">
    <property name="title">
     <string>Edit</string>
    </property>
    <addaction name="actionCut"/>
    <addaction name="actionCopy"/>
    <addaction name="actionPaste"/>
    <addaction name="separator"/>
    <addaction name="actionRedo"/>
    <addaction name="actionUndo"/>
    <addaction name="separator"/>
    <addaction name="actionFont"/>
    <addaction name="actionColor"/>
    <addaction name="actionBackground_Color"/>
    <addaction name="actionBackgroung_Color_Edit_Text"/>
   </widget>
   <widget class="QMenu" name="menuAbout">
    <property name="title">
     <string>about</string>
    </property>
    <addaction name="actionAbout_Notepad"/>
   </widget>
   <addaction name="menuFile"/>
   <addaction name="menuEdit"/>
   <addaction name="menuAbout"/>
  </widget>
  <widget class="QToolBar" name="mainToolBar">
   <attribute name="toolBarArea">
    <enum>TopToolBarArea</enum>
   </attribute>
   <attribute name="toolBarBreak">
    <bool>false</bool>
   </attribute>
   <addaction name="actionNew"/>
   <addaction name="actionOpen"/>
   <addaction name="actionSave"/>
   <addaction name="actionSave_as"/>
   <addaction name="separator"/>
   <addaction name="actionCut"/>
   <addaction name="actionCopy"/>
   <addaction name="actionPaste"/>
   <addaction name="separator"/>
   <addaction name="actionRedo"/>
   <addaction name="actionUndo"/>
   <addaction name="separator"/>
   <addaction name="actionAbout_Notepad"/>
  </widget>
  <widget class="QStatusBar" name="statusBar"/>
  <action name="actionNew">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/new.png</normaloff>:/rec/img/new.png</iconset>
   </property>
   <property name="text">
    <string>New</string>
   </property>
  </action>
  <action name="actionOpen">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/open.png</normaloff>:/rec/img/open.png</iconset>
   </property>
   <property name="text">
    <string>Open</string>
   </property>
  </action>
  <action name="actionSave">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/save.png</normaloff>:/rec/img/save.png</iconset>
   </property>
   <property name="text">
    <string>Save</string>
   </property>
  </action>
  <action name="actionSave_as">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/save-as.png</normaloff>:/rec/img/save-as.png</iconset>
   </property>
   <property name="text">
    <string>Save as</string>
   </property>
  </action>
  <action name="actionCut">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/cut.png</normaloff>:/rec/img/cut.png</iconset>
   </property>
   <property name="text">
    <string>Cut</string>
   </property>
  </action>
  <action name="actionCopy">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/copy.png</normaloff>:/rec/img/copy.png</iconset>
   </property>
   <property name="text">
    <string>Copy</string>
   </property>
  </action>
  <action name="actionPaste">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/paste.png</normaloff>:/rec/img/paste.png</iconset>
   </property>
   <property name="text">
    <string>Paste</string>
   </property>
  </action>
  <action name="actionRedo">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/redo.png</normaloff>:/rec/img/redo.png</iconset>
   </property>
   <property name="text">
    <string>Redo</string>
   </property>
  </action>
  <action name="actionUndo">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/undo.png</normaloff>:/rec/img/undo.png</iconset>
   </property>
   <property name="text">
    <string>Undo</string>
   </property>
  </action>
  <action name="actionAbout_Notepad">
   <property name="icon">
    <iconset resource="resource.qrc">
     <normaloff>:/rec/img/about.png</normaloff>:/rec/img/about.png</iconset>
   </property>
   <property name="text">
    <string>About Notepad</string>
   </property>
  </action>
  <action name="actionFont">
   <property name="text">
    <string>Font</string>
   </property>
  </action>
  <action name="actionColor">
   <property name="text">
    <string>Color</string>
   </property>
  </action>
  <action name="actionBackground_Color">
   <property name="text">
    <string>Background Color</string>
   </property>
  </action>
  <action name="actionBackgroung_Color_Edit_Text">
   <property name="text">
    <string>Backgroung Color Edit Text</string>
   </property>
  </action>
  <action name="actionPrint">
   <property name="text">
    <string>Print</string>
   </property>
  </action>
 </widget>
 <layoutdefault spacing="6" margin="11"/>
 <resources>
  <include location="resource.qrc"/>
 </resources>
 <connections/>
</ui>

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

<?xml version="1.0" encoding="UTF-8"?>

<class>MainWindow</class>

<rect>

</rect>

</property>

<string>MainWindow</string>

</property>

<item>

</item>

</layout>

</widget>

<rect>

</rect>

</property>

</property>

</widget>

</property>

</widget>

<string>about</string>

</property>

</widget>

</widget>

<enum>TopToolBarArea</enum>

</attribute>

<bool>false</bool>

</attribute>

</widget>

</property>

</property>

</action>

</property>

</property>

</action>

</property>

</property>

</action>

</property>

</property>

</action>

</property>

</property>

</action>

</property>

</property>

</action>

<normaloff>:/rec/img/paste.png</normaloff>:/rec/img/paste.png</iconset>

</property>

<string>Paste</string>

</property>

</action>

</property>

</property>

</action>

</property>

</property>

</action>

<normaloff>:/rec/img/about.png</normaloff>:/rec/img/about.png</iconset>

</property>

<string>About Notepad</string>

</property>

</action>

</property>

</action>

<string>Color</string>

</property>

</action>

<string>Background Color</string>

</property>

</action>

<string>Backgroung Color Edit Text</string>

</property>

</action>

<string>Print</string>

</property>

</action>

</widget>

</resources>

</ui>

resource.qrc

<RCC>
    <qresource prefix="/rec">
        <file>img/about.png</file>
        <file>img/copy.png</file>
        <file>img/cut.png</file>
        <file>img/new.png</file>
        <file>img/open.png</file>
        <file>img/paste.png</file>
        <file>img/redo.png</file>
        <file>img/save.png</file>
        <file>img/save-as.png</file>
        <file>img/undo.png</file>
    </qresource>
</RCC>

1

2

3

4

5

6

7

8

9

10

11

12

13

14

<RCC>

<file>img/about.png</file>

<file>img/paste.png</file>

</qresource>

</RCC>

output

C++ Program to Convert Integer to String

December 1, 2016 admin 0

C++ Program to Convert Integer into a String

using namespace std;
#include <string>
#include <sstream>
#include <iostream>
template <class T>
std::string to_string(T t, std::ios_base & (*f)(std::ios_base&))
{
    std::ostringstream oss;
    oss << f << t;
                return oss.str();
}
int main()
{
                // the second parameter of to_string() should be one of
                // std::hex, std::dec or std::oct
    std::cout<<to_string<long>(123456, std::hex)<<std::endl;
    std::cout<<to_string<long>(123456, std::oct)<<std::endl;
                return 0;
}
/*
OUTPUT:
1e240
361100
*/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

using namespace std;

#include <string>

#include <sstream>

#include <iostream>

template <class T>

std::string to_string(T t, std::ios_base & (*f)(std::ios_base&))

{

std::ostringstream oss;

oss << f << t;

return oss.str();

}

int main()

{

// the second parameter of to_string() should be one of

// std::hex, std::dec or std::oct

std::cout<<to_string<long>(123456, std::hex)<<std::endl;

std::cout<<to_string<long>(123456, std::oct)<<std::endl;

return 0;

}

/*

OUTPUT:

1e240

361100

*/

C++ Function To Convert String To Numeric Integer

float              stof(const string& str, size_t *idx = 0);
double             stod(const string& str, size_t *idx = 0);
long double        stold(const string& str, size_t *idx = 0);
int                stoi(const string& str, size_t *idx = 0, int base = 10);
long               stol(const string& str, size_t *idx = 0, int base = 10);
unsigned long      stoul(const string& str, size_t *idx = 0, int base = 10);
long long          stoll(const string& str, size_t *idx = 0, int base = 10);
unsigned long long stoull(const string& str, size_t *idx = 0, int base = 10);

1

2

3

4

5

6

7

8

float stof(const string& str, size_t *idx = 0);

double stod(const string& str, size_t *idx = 0);

long double stold(const string& str, size_t *idx = 0);

int stoi(const string& str, size_t *idx = 0, int base = 10);

long stol(const string& str, size_t *idx = 0, int base = 10);

unsigned long stoul(const string& str, size_t *idx = 0, int base = 10);

long long stoll(const string& str, size_t *idx = 0, int base = 10);

unsigned long long stoull(const string& str, size_t *idx = 0, int base = 10);

C++ Function […]

C++ Program to convert hexadecimal to decimal

November 28, 2016 admin 1

C++ Program to convert hexadecimal to decimal with std::hex

/**
 * Converting Hexadecimal to Decimal in C++  codebind.com
 *
 */

#include <iostream>
int main()
{
  int integer;
  std::cout<<"Entex Hex to Convert hex to decimal"<<std::endl;
  std::cin >> std::hex >> integer;
  std::cout << integer << std::endl;
  return 0;
}


/*
OUTPUT:
Entex Hex to Convert hex to decimal
10
16
*/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

/**

* Converting Hexadecimal to Decimal in C++ codebind.com

*

*/

#include <iostream>

int main()

{

int integer;

std::cout<<"Entex Hex to Convert hex to decimal"<<std::endl;

std::cin >> std::hex >> integer;

std::cout << integer << std::endl;

return 0;

}

/*

OUTPUT:

Entex Hex to Convert hex to decimal

10

16

*/

C++ Program to convert hexadecimal to decimal without std::hex

/**
 * Converting Hexadecimal to Decimal in C++  codebind.com
 *
 */


#include<iostream>
#include<stdlib.h>
#include<conio.h>
#include<math.h>


unsigned long HexToDec(char hex[]) {
  char *hexstr;
  int length = 0;
  const int base = 16;     // Base of Hexadecimal Number
  unsigned long decnum = 0;
  int i;

  // Now Find the length of Hexadecimal Number
  for (hexstr = hex; *hexstr != '\0'; hexstr++) {
      length++;
    }

  // Now Find Hexadecimal Number
  hexstr = hex;
  for (i = 0; *hexstr != '\0' && i < length; i++, hexstr++) {
      // Compare *hexstr with ASCII values
      if (*hexstr >= 48 && *hexstr <= 57) {  // is *hexstr Between 0-9
          decnum += (((int)(*hexstr)) - 48) * pow(base, length - i - 1);
        }
      else if ((*hexstr >= 65 && *hexstr <= 70))  {  // is *hexstr Between A-F
          decnum += (((int)(*hexstr)) - 55) * pow(base, length - i - 1);
        }
      else if (*hexstr >= 97 && *hexstr <= 102) {  // is *hexstr Between a-f
          decnum += (((int)(*hexstr)) - 87) * pow(base, length - i - 1);
        }
      else {
          std::cout<<"Invalid Hexadecimal Number \n";

        }
    }
  return decnum;
}

void main() {
  unsigned long decnum;
  char hex[9];     // 8 characters for 32-bit Hexadecimal Number and one for ' '

  std::cout<<" Enter 32-bit Hexadecimal Number : ";
  std::cin>>hex;

  decnum = HexToDec(hex);
  std::cout<<"Value in Decimal Number is "<<decnum<<"\n";

  getch();
}


/*
OUTPUT:
Enter 32-bit Hexadecimal Number : 10
Value in Decimal Number is 16

*/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

/**

* Converting Hexadecimal to Decimal in C++ codebind.com

*

*/

#include<iostream>

#include<stdlib.h>

#include<conio.h>

#include<math.h>

unsigned long HexToDec(char hex[]) {

char *hexstr;

int length = 0;

const int base = 16; // Base of Hexadecimal Number

unsigned long decnum = 0;

int i;

// Now Find the length of Hexadecimal Number

for (hexstr = hex; *hexstr != '\0'; hexstr++) {

length++;

}

// Now Find Hexadecimal Number

hexstr = hex;

for (i = 0; *hexstr != '\0' && i < length; i++, hexstr++) {

// Compare *hexstr with ASCII values

if (*hexstr >= 48 && *hexstr <= 57) { // is *hexstr Between 0-9

decnum += (((int)(*hexstr)) - 48) * pow(base, length - i - 1);

}

else if ((*hexstr >= 65 && *hexstr <= 70)) { // is *hexstr Between A-F

decnum += (((int)(*hexstr)) - 55) * pow(base, length - i - 1);

}

else if (*hexstr >= 97 && *hexstr <= 102) { // is *hexstr Between a-f

decnum += (((int)(*hexstr)) - 87) * pow(base, length - i - 1);

}

else {

std::cout<<"Invalid Hexadecimal Number \n";

}

return decnum;

}

void main() {

unsigned long decnum;

char hex[9]; // 8 characters for 32-bit Hexadecimal Number and one for ' '

std::cout<<" Enter 32-bit Hexadecimal Number : ";

std::cin>>hex;

decnum = HexToDec(hex);

std::cout<<"Value in Decimal Number is "<<decnum<<"\n";

getch();

}

/*

OUTPUT:

Enter 32-bit Hexadecimal Number : 10

Value in Decimal Number is 16

*/

[…]

C++ program to Convert Binary To Decimal

November 27, 2016 admin 0

/**
 * CONVERTING BINARY TO DECIMAL IN C++ codebind.com
 *
 */

#include <iostream>
#include <iomanip>
#include <string>
#include <climits>

using namespace std;

const size_t maxBits = sizeof(short) * CHAR_BIT;

int main(int argc, char *argv[]) {
  string line;
  bool inputOk;
  short n;

  while (true) {
      cout << "Enter binary number (" << maxBits;
      cout << " bits or less) : " << endl;
      do {
          cout << "> ";
          getline(cin,line);
          inputOk = true;
          for (size_t i = 0; (i < line.size()) && (inputOk == true); i++) {
              if ((line[i] != '0') && (line[i] != '1')) {
                  inputOk = false;
                  cout << "non-bit entered" << endl;
                }
            }
          if ((inputOk == true) && (line.size() > maxBits)) {
              inputOk = false;
              cout << "too big for " << maxBits << "-bit integer" << endl;
            }
        } while (inputOk == false);

      // Convert string of bits to an integer
      n = 0;
      for (int i = line.size()-1, j = 0; i >= 0; --i,j++) {
          n |= (line[i] - '0') << j;
        }
      cout << line << " = " << n << endl;
    }
  return 0;
}

/*
OUTPUT:
Enter binary number (16 bits or less) :
> 101000
101000 = 40
Enter binary number (16 bits or less) :
> 10
10 = 2
Enter binary number (16 bits or less) :
> 10
10 = 2
Enter binary number (16 bits or less) :
> 101
101 = 5
Enter binary number (16 bits or less) :
>

*/

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

/**

* CONVERTING BINARY TO DECIMAL IN C++ codebind.com

*

*/

#include <iostream>

#include <iomanip>

#include <string>

#include <climits>

using namespace std;

const size_t maxBits = sizeof(short) * CHAR_BIT;

int main(int argc, char *argv[]) {

string line;

bool inputOk;

short n;

while (true) {

cout << "Enter binary number (" << maxBits;

cout << " bits or less) : " << endl;

do {

cout << "> ";

getline(cin,line);

inputOk = true;

for (size_t i = 0; (i < line.size()) && (inputOk == true); i++) {

if ((line[i] != '0') && (line[i] != '1')) {

inputOk = false;

cout << "non-bit entered" << endl;

}

if ((inputOk == true) && (line.size() > maxBits)) {

inputOk = false;

cout << "too big for " << maxBits << "-bit integer" << endl;

}

} while (inputOk == false);

// Convert string of bits to an integer

n = 0;

for (int i = line.size()-1, j = 0; i >= 0; --i,j++) {

n |= (line[i] - '0') << j;

}

cout << line << " = " << n << endl;

}

return 0;

}

/*

OUTPUT: