#include <stdio.h>
#define max(a,b) ((a) > (b) ? (a) : (b))

int main()
{
    int n = 29;
    int m = 23;

    printf("n = %d, m = %d\n", n, m);
    printf("the big one is %d\n", max(n++,m));
    printf("n = %d, m = %d\n", n, m);

    return 0;
}