How to use new to dynamically request a two-dimensional array, and then how to use Delete to release

#define ROW 100
#define COL 200
#define T char (int,float,....)//Universal Data type
T * * * PTEMP;
*ptemp = new T[row];
for (int i = 0; i < COL i + +)
Ptemp[i] = new T[col};

Delete
for (int i =0 i < COL i + +)
Delete [] ptemp[i];
delete [][]ptemp;

Take the image as an example
Distribution:
int height = Value1;//value is used to allocate memory
int width = value2;
Lpbyte *lpimage;
Lpimage = new Lpbyte[height];
for (int i = 0; i < height; i++)
Lpimage[i] = new Byte[width]
Release:
for (int i = 0; i < height; i++)
Delete [] lpimage[i];
Delete[] Lpimage;
This should be true, but I did not allocate memory failed error handling.

Reproduced from: http://blog.sina.com.cn/s/blog_467338ba0100005o.html