How to swap two numbers in C++ Language ?

Introduction: In my previous article I explained What is C++ Language ? Calculate sum of two numbers in C++ Language  and Swapping two numbers without using temporary variable and Another way to Swap two numbers without using temporary variable .
Now in this article I have explained How to swap/interchange two numbers/values in C++ Language. Swapping of two numbers in C++ is not a difficult task.

Implementation: Let's create a vary basic  program to swap two number.

#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= 20

Enter second number= 50

Value of first number before swapping= 20

Value of second number before swapping= 50

Value of first number after swapping= 50

Value of second number after swapping= 20

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