C Program for swapping of 2 Numbers without using third Variable

#include<stdio.h>

int main()
{
         int a, b ;
         printf("Enter 2 Numbers \n");
         scanf("%d \t %d",&a,&b);

         a = a + b ;
         b = a - b ;
         a = a - b ;

        printf("The swapped Numbers are ");
        printf("a = %d \t b= %d \n",a,b);

       return 0;


}