#define MAC variable

#include <stdio.h>
main() {
    int i, MAC;
    MAC = 1;
    for (i=1; i<=6; i++) {
        if (MAC <= 3) {
            printf("(if)      MAC <= 3, MAC is %d\n", MAC);
        }
        #if MAC <= 3
            printf("    (#if) MAC <= 3, MAC is %d\n", MAC);
        #endif
        MAC++;
    }
    return 0;
}