Exchange the value of two numeric variables without using a third variable. In C

/*

Language : C

Exchange the value of two numeric variables

without using a third variable

This works for int and float types

By Hemanth Roy MV, 2005

*/

#include<stdio.h>

int main()

{

float a, b;

printf("Enter value for 'a'\n");

scanf("%f", &a);

printf("Enter value for 'b'\n");

scanf("%f", &b);

printf("a = %f\tb = %f\n\n", a, b);

if (a<b){

b=b/a; a=a*b; b=a/b;

} else {

a=a/b; b=b*a; a=b/a;

}

printf("a = %f\tb = %f\n\n", a, b);

return 0;

}