Write a C Program to Swap two numbers without third variable.

#include<stdio.h>

int main()

{

   int a,b;

   printf(“Enter two numbers :\n”);

   scanf(“%d %d”,&a,&b);

   printf(“Before Swapping : a = %d, b = %d\n”,a,b);

   a=a+b;

   b=a-b;

   a=a-b;

   printf(“After Swapping : a = %d, b = %d\n”,a,b);

   return 0;

}

Output :

Enter two numbers :

65    9521

Before Swapping : a = 65, b = 9521

After Swapping : a = 9521, b = 65