用C++实现矩阵指定列交换并输出

```cpp #include <iostream> using namespace std; int n, m, x, y, a[10][10]; int main() { cin >> n >> m; for (int i = 1; i <= n; i++) { for (int j = 1; j <= m; j++) { cin >> a[i][j]; } } cin >> x >> y; // 交换第 x 列和第 y 列 for (int i = 1; i <= n; i++) { swap(a[i][x], a[i][y]); } // 输出交换后的矩阵 for (int i = 1; i <= n; i++) { for (int j = 1; j <= m; j++) { cout << a[i][j]; if (j < m) { cout << " "; } } cout << endl; } return 0; } ``` ######[AI问答 | 260点数解答 | 2026-04-25 19:40:56]