int jie = 1; for (int i = 1; i <= 4; i++) { jie = jie * i; cout << jie << " "; } cout << endl; 输出是( )。 A. 1 2 6 24 B. 2 6 24 C. 1 2 3 4 D. 24,以为四轮输出会互相覆盖,屏幕只剩最后一轮