79. 괄호 없는 매크로의 치환 함정

1#include <stdio.h>
2 
3#define SQ(x) x * x
4#define SQ2(x) ((x) * (x))
5#define TWICE(x) x + x
6#define BIG(a, b) a > b ? a : b
7 
8int main() {
9    int a = 3, b = 2;
10    int s = 0;
11    printf("%d %d\n", SQ(a + 1), SQ2(a + 1));
12    printf("%d %d\n", 100 / SQ(b), 100 / SQ2(b));
13    printf("%d %d\n", TWICE(a) * 2, BIG(a, b) + 10);
14    for (int i = 1; i <= 3; i++) {
15        s += SQ(i + 1);
16    }
17    printf("%d\n", s);
18    return 0;
19}