二维动态数组的初始化

#include<iostream>
using namespace std;
int main(void) {
  int rows = 6;//6行
  int cols = 8;//8列
  //开辟内存指向每一行,每一行都是一个一维数组
  int** arr = new int* [rows];
  //为每一行开辟内存
  for (int i = 0; i < rows; i++) {
    arr[i] = new int[cols];
  }
  //为二维数组赋初值
  for (int i = 0; i < rows; i++) {
    for (int j = 0; j < cols; j++) {
      arr[i][j] = 0;
    }
  }
  //释放内存
  delete[]arr;
  return 0;
}