题解 | 创建二维动态数组

#include<bits/stdc++.h>
using namespace std;
int main() {
    int n;
    cin >> n;
    // write your code here......
    //使用new来新建二维动态数组
    int** arr = new int* [n];
    for (int i = 0; i < n; i++)
        arr[i] = new int[n];

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            arr[i][j] = i + j;
            cout << arr[i][j] << " ";
        }
        cout << endl;
    }
    //释放内存空间
    for (int i = 0; i < n; i++)
        delete[] arr[i];
    delete[] arr;

    return 0;
}