Swap two numbers in C++ Language ?

Introduction: 

 In  this article I have explained How to swap/interchange two numbers/values in C++ Language. In this article I have temporary variable to swap numbers.

Implementation: Let's create a simple program to swap two numbers.

#include<iostream.h>

#include<conio.h>

void main()

{

 clrscr();

 int a,b,temp;

 cout<<"Enter first number= ";

 cin>>a;

 cout<<"Enter second number= ";

 cin>>b;

 cout<<"\nValue of first number before swapping= "<<a;

 cout<<"\nValue of second number before swapping= "<<b;

 temp=a;

 a=b;

 b=temp;

 cout<<"\nValue of first number after swapping= "<<a;

 cout<<"\nValue of second number after swapping= "<<b;

 getch();

 }

Run the program using ctrl+F9

Output:

Enter first number= 2

Enter second number= 5

Value of first number before swapping= 2

Value of second number before swapping= 5

Value of first number after swapping= 5

Value of second number after swapping= 2