C++用new生成一个动态二维数组

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//Microsoft Visual Studio 2015 Enterprise
//变长二维数组

#include <iostream>   
#include<iomanip>
using namespace std;
int main()
{
       int lineNum=4, rowNum=4;          //lineNum指行数，rowNum指列数
       //为二维数组开辟空间
       int **p = new int *[lineNum];            //lineNum个*p
       for (int i = 0; i < lineNum; i++)
       {
              p[i] = new int[rowNum];
       }
       //赋值
       for (int j = 0; j < lineNum; j++)
       {
              for (int k = 0; k < rowNum; k++)
              {
                     p[j][k] = (j + 1)*(k + 1);
                     cout << setw(6) << p[j][k] << ":" << setw(8) << &p[j][k];
              }
              cout << endl;
       }
       //释放二维数组占用的空间
       for (int m = 0; m < lineNum; m++)
       {
              delete[] p[m];
       }
       delete[] p;
  
       return   0;
}