C++申请动态二维数组

#include <iostream>using namespace std;int main(){int m,n,i,j;cin>>m>>n;int **arr=new int* [m];for(i=0;i<m;i++){arr[i]=new int[n];}for(i=0;i<m;++i){for(j=0;j<n;++j){arr[i][j]=i*10+j;cout<<arr[i][j]<<" ";}cout<<endl;}for(i=0;i<m;++i)delete arr[n];delete []arr;}