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......
    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;
    }

    for (int i = 0; i < n; ++i)
    {
        delete[] arr[i];
    }
    delete[] arr;
    
    return 0;
}

使用二级指针。