Swapping of Two Numbers without Third Variable

/*
Write a program in C for Swapping of two numbers without third variable
*/

#include<stdio.h>

main()
{
int a, b;

printf("Enter two numbers to swap ");
scanf("%d%d",&a,&b);

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

printf("a = %d\nb = %d\n",a,b);
return 0;
}