Mathematical Operation

//Author   :LearningPen
//Date     : 28/9/2014
//Language : C++
//Tool     : Dev C++

//Notice:Reference http://www.sourcecodester.com/cc/7937/c-functions-basic-mathematical-operation.html

#include <iostream>
#include <windows.h>  // for system...
#include <conio.h>    //getch()

using std::cout;
using std::cin;


class MathOp
{
public:
void addition( int num1, int num2 );
void subtraction( int num1, int num2 );
void multiplication( int num1, int num2 );
void division( int num1, int num2 );

};

void Menu( void );
void gotoxy( int x, int y );
void textcolor( int color );

//-------Main function ---------------------
int main(int argc, char** argv)
{
int choice;
int num1, num2;
MathOp algorithm;

do
{

Menu();

textcolor( 11 );
gotoxy( 22, 16 );
cout<< "Enter your choice : ";
cin>> choice;

if( choice>= 1 && choice< 5 )
{

   system( "cls" );
textcolor( 14 );
gotoxy( 18, 4);
cout<< "*******************************";
gotoxy( 18, 5 );
cout<< "*   Mathemactical Operation   *";
gotoxy( 18, 6 );
cout<< "*******************************";

gotoxy( 22, 8 );
cout<< "Please enter two numbers.";

gotoxy( 22, 10 );
cout<< "Num1: ";
cin>> num1;

gotoxy( 22, 11 );
cout<< "Num2: ";
cin>> num2;
  }

switch( choice )
{

case 1:
{
gotoxy( 22, 13 );
algorithm.addition( num1, num2 );

gotoxy( 22, 15 );
           cout<< "Press any key return Menu.";
         
break;
}
case 2:
{
gotoxy( 22, 13 );
algorithm.subtraction( num1, num2 );

gotoxy( 22, 15 );
           cout<< "Press any key return Menu.";
         
break;
}
case 3:
{
gotoxy( 22, 13 );
algorithm.multiplication( num1, num2 );

gotoxy( 22, 15 );
           cout<< "Press any key return Menu.";

break;
}
case 4:
{
gotoxy( 22, 13 );
algorithm.division( num1, num2 );

gotoxy( 22, 15 );
           cout<< "Press any key return Menu.";
         
break;
}
default:
{
gotoxy( 22, 18 );
           cout<< "Press any key return Menu.";
}
}


getch();

}while( choice!= 5);


return 0;
}

//---------Other function----------------------
void gotoxy( int x, int y )
{
COORD pos= { 0, 0 };

pos.X= x;
pos.Y= y;

HANDLE handle= GetStdHandle( STD_OUTPUT_HANDLE );

SetConsoleCursorPosition( handle, pos );

return ;
}

void textcolor( int color )
{
HANDLE handle= GetStdHandle( STD_OUTPUT_HANDLE );

SetConsoleTextAttribute( handle, color );

return ;
}
void Menu( void )
{
system( "cls" );
gotoxy( 18 , 4 );
textcolor( 14 );
     
cout<< "*******************************";
gotoxy( 18, 5 );
cout<< "*   Mathemactical Operation   *";
gotoxy( 18, 6 );
cout<< "*******************************";

gotoxy( 22, 8 );
cout<< " 1.) Addition ";

gotoxy( 22, 9 );
cout<< " 2.) Subtraction ";

gotoxy( 22, 10 );
cout<< " 3.) Multiplication ";

gotoxy( 22, 11 );
cout<< " 4.) Division ";

gotoxy( 22, 12 );
cout<< " 5.) Exit ";

gotoxy( 18, 14 );
cout<< "*******************************";

return ;
}

//--------Class function -----------
void MathOp::addition( int num1, int num2 )
{
cout<< num1<< " + "<< num2<< " = "<< num1+ num2;

return ;
}

void MathOp::subtraction( int num1, int num2 )
{          
cout<< num1<< " - "<< num2<< " = "<< num1- num2;

return ;
}

void MathOp::multiplication( int num1, int num2 )
{
cout<< num1<< " * "<< num2<< " = "<< num1* num2;

return ;
}

void MathOp::division( int num1, int num2 )
{
if( num2== 0 )
{
system( "cls" );

cout<< "Dividend cannot be zero!!";

Sleep( 1000 );

exit( 1 );
}

cout<< num1<< " / "<< num2<< " = "<< num1/ num2;

return ;
}


Screenshot: