如下数字图形(N=10)在执行后续的 C++ 代码、输入 10 时输出。横线处应填入的代码是( )。
图形(N = 10):
1 1 1 1 1 1 1 1 1 1
1 1 0 0 0 0 0 0 0 1
1 0 1 0 0 0 0 0 0 1
1 0 0 1 0 0 0 0 0 1
1 0 0 0 1 0 0 0 0 1
1 0 0 0 0 1 0 0 0 1
1 0 0 0 0 0 1 0 0 1
1 0 0 0 0 0 0 1 0 1
1 0 0 0 0 0 0 0 1 1
1 1 1 1 1 1 1 1 1 1
代码:
int N;
cin >> N;
for (int i = 1; i < N + 1; i++) {
for (int j = 1; j < N + 1; j++)
if (________)
cout << "1 ";
else
cout << "0 ";
cout << endl;
}
- A. i == j and i == 1 and j == 1 and i == N and j == N
- B. i == j or i == 1 or j == 1 or i == N or j == N
- C. i == j or i == 0 or j == 0 or i == (N + 1) or j == (N + 1)
- D. i == j and i == 1 and j == 1 and i == (N + 1) and j == (N + 1)
正确答案：B