Troca de entradas

// Apple Xcode


#include <stdio.h>

// macro
#define troca(the_x, the_y) { int the_temp; the_temp = the_x; (the_x) = (the_y); (the_y) = the_temp; }

int main (int argc, const char * argv[])
{
    /* troca de conteudos usando macro */
    int the_x, the_y;

    printf("x: ");
    scanf("%i", &the_x);

    printf("y: ");
    scanf("%i", &the_y);

    troca(the_x, the_y);

    printf("x = %i, y = %i", the_x, the_y);

    return 0;
}