C Program Swapping Number.

a)  With using third variable.

Program:

#include<stdio.h>

#include<conio.h>

void main()

{

   int x, y,temp;  //Declaring Variable.

   printf("Enter the value of x and y\n");  //For printing

   scanf("%d%d",&x,&y);  //For Input.

   printf("Before Swapping\nx = %d\ny = %d\n", x, y);  //For printing

   //performing Swap 

  temp=b;

  b=a;

  a= temp;

   printf("After Swapping\nx = %d\ny = %d\n", x, y);  //For printing

getch();  //Getting a character or waiting for key press

}

Output:

b) Without using third Variable

 Program:

#include<stdio.h>

#include<conio.h>




void main()

 {

   int a, b;  //Declaring Variable.





    




   

   printf("\nEnter value for num1 & num2 : ");  //For printing

   scanf("%d %d", &a, &b); //For Input.




    //performing Swap

   a = a + b;   

   b = a - b;

   a = a - b;




   printf("\nAfter swapping value of a : %d", a);  //For printing

   printf("\nAfter swapping value of b : %d", b);  //For printing

   getch();  //Getting a character or waiting for key press




}

Output: