2d heap array

#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int main(){

    int row  = 4;
    int col = 3;

    int *pArr= new int [row];//1D array
    delete[] pArr;

    //2D array
    int **ppArr = new int *[row]; // pointer-to-pointer
    for (int i = 0 ; i< row; i++)
        ppArr[i] = new int[col];

    ppArr[1][0] =1000;
    /*pArr[3] = 100;*/
    for (int i=0; i< row;i++){
        for(int j =0; j<col;j++)
        {
            cout << ppArr[i][j] <<"\t";
        }

        cout<<endl;
    }

    for (int i = 0; i< row;i++)
        delete[] ppArr[i];
    delete[] ppArr;




    return 0;
}