Exercise 4.14. Define a macro swap(t,x,y) that interchanges two arguments of type t.

Exercise 4.14. Define a macro swap(t,x,y) that interchanges two arguments of type t.

(Block structure will help.)

/* swap(t, x, y) */

#include <stdio.h>

#define SWAP(t, x, y) {t tmp;\

                        tmp = y;\

                        y = x;\

                        x = tmp;}

int main()

{

    int a, b;

    

    a = 25;

    b = 1;

    SWAP(int, a, b);

    printf("a - %d\nb - %d\n", a, b);

    return 0;

}

Result: