编程之美1.2 | 中国象棋将帅问题

 1 void chess1() {
 2     struct {
 3         unsigned char a:4;
 4         unsigned char b:4;
 5     } i;
 6     cout << "sizeof(i): " << sizeof(i) << endl;
 7     for (i.a = 1; i.a <= 9; i.a++) {
 8         for (i.b = 1; i.b <= 9; i.b++) {
 9             if (i.a % 3 == i.b % 3) continue;
10             cout << (int)i.a << " " << (int)i.b << endl;
11         }
12     }
13 }
14 
15 void chess2() {
16     for (char n = 80; n >= 0; --n) {    
17         if (n / 9 % 3 == n % 9 % 3) continue;
18         cout << n / 9 + 1 << " " << n % 9 + 1 << endl;
19     }
20 }