题解 | #创建二维动态数组#

#include<bits/stdc++.h>
#include <cstddef>
using namespace std;
int main(){
    int n;
    cin>>n;
    // write your code here......
    int **arr = new int*[n]; //新建指针数组
    for(int i = 0; i < n; ++i){
        arr[i] = new int[n];
    }
    for(int j = 0; j < n; ++j){ //下标访问输入
        for(int k = 0; k < n; ++k){
            arr[j][k] = j + k;
        }
    }
    for(int j = 0; j < n; ++j){ //指针访问输出
        for(int k = 0; k < n; ++k){
            cout<<*(*(arr + j) + k)<<" ";
        }
        cout<<endl;
    }
    for(int i = 0; i < n; ++i){
        delete[] arr[i];
        arr[i] = nullptr;
    }
    delete[] arr;
    arr = nullptr;
    return 0;
}