c++ vector 构建二维数组

#include <iostream>
#include <vector>

using namespace std;

int main ()
{
  //二维数组初始化
  vector<vector<int>> array2(5);
  for(int i=0;i < array2.size();++i)
  {
      array2[i].resize(3);
  }


  //输出二维数组
  for(int i = 0 ;i < array2.size();++i )
  {
      for(int j=0;j<array2[0].size();++j)
      {
          cout << array2[i][j] << " ";
      }
      cout << endl;
  }
  cout << endl;
  
  return 0;
}