qfedu-c-level/day7/d14.c

#include <stdio.h>
#define M(a, b) (a) * (b)

int main(int argc, char const *argv[])
{
    printf("%d*%d=%d\n", 2 + 5, 6 - 3, M(2 + 5, 6 - 3));
    return 0;
}