如果x等于y，则打印“1”；如果x大于y，则打印“2”；否则打印“3”。
int x = 50; int y = 50; @(2) (x @(2) y) { cout << "1"; } @(7) (x @(1) y) { cout << "2"; } @(4) { cout << "3"; }
int x = 50; int y = 50; if (x == y) { cout << "1"; } else if (x > y) { cout << "2"; } else { cout << "3"; }