Write a program in C to swap 2 numbers.( without using 3rd variable)

                   

 Program in C to add 2 numbers 

#include<stdio.h>

#include<conio.h>

int main()

{

int a,b;

printf("Enter the value of a = ");

scanf("%d",&a);

printf("Enter the value of b = ");

scanf("%d",&b);

a=a+b;

        b=a-b;

        a=a-b;

printf(" Value in a = %d \n Value in b = %d",a,b);

return 0;

}

Output:-