C++ USES new to create two dimensional array and pointer array instance code

Create a 2-dimensional array method using new

#include <iostream>
using namespace std;
void main()
{
// with new create 1 a 2 Dimensional array , There are two ways , Are equivalent 
//1:
int (*p)[10] = new int[5][10];
//2:
int **p = new int* [5];
for(int i=0;i <5;i++)
p[i] = new int[10];
// The creation of a pointer array , There are two ways 
//1:
char **pa = new char* [4];
for (int i=0;i <4;i++)
{
pa[i] = new char[8]; // Assign each pointer 8 a char Element space. 
}
//2:
char *pa[4];// Don't have to new create 
for (int i=0;i <4;i++)
{
pa[i] = new char[8]; // Assign each pointer 8 a char Element space. 
}
//delete2 Dimensional array 
//for1:
delete []p;
//for2:
for(int i=0; i <5; ++i)
delete []p[i];
delete []p;
//delete Pointer to an array 
//for1:
for(int i=0; i <4; ++i)
delete []pa[i];
delete []pa;
//for2:
for(int i=0; i <4; ++i)
delete []pa[i];
}