Program in c to swap the value of two no’s without using third variable

#include<stdio.h>

#include<conio.h>Program in c to swap the value of two no’s without using third variable

void main()

{

  int a,b;

  clrscr();

  printf(“ input two variable a and b:\n”);

  scanf(“%d%d”,&a,&b);

  a=a+b;

  b=a-b;

  a=a-b;

  printf(“swap of value\na=%d\nb=%d”,a,b);

  getch();

}

output:

input two variables a and b:

7

9

swap of value

a=9

b=7