C++ new

 //#include "stdafx.h"
 #include <iostream>

 using namespace std;

 int main() {
     int m = , n = , ** p = new int*[m]; // 10 lines and 5 columns. initial value is not zero. non-contiguous space
     int i;
     for (i = ; i < ; i++) {
         p[i] = new int[n]; // generate an array of the second dimension
     }

     printf("%d\n", p[][]); // random value

     for (i = ; i < ; i++) {
         delete[] p[i]; // delete the array of the second dimension
     }
     delete[] p; // delete the array of the first dimension

     system("pause");
     return ;
 }

参考资料

C++中怎么用new定义一个二维数组？

C++二维数组new小结