動態二維數組（可變二維數組） 指向指針的指針

根據輸入的行列數，動態開闢二維數組空間。代碼如下：

#include <iostream>
using namespace std;

int main()
{
	int row, col;	//矩陣行列
	cout << "Row: ";	
	cin >> row;
	cout << "Col: ";
	cin >> col;
	int** p_p_int = new int*[row];	
	for (int i = 0; i < row; i++)
	{
		p_p_int[i] = new int[col];
	}
	int count = 0;
	for (int m = 0; m < row; m++)
	{
		for (int n = 0; n < col; n++)
		{
			p_p_int[m][n] = count++;
		}
	}
	cout << "----------Matrix----------" << endl;
	for (int m = 0; m < row; m++)
	{
		for (int n = 0; n < col; n++)
		{
			cout << p_p_int[m][n] << " ";
		}
		cout << endl;
	}
	for (int j = 0; j < row; j++)	//釋放每行指針
	{
		delete [] p_p_int[j];
	}
	delete [] p_p_int;	//釋放指向行的指針
	return 0;
}

需要注意指向指針的指針和二維數組在物理存儲上的區別。（二維數組爲線性連續存儲，指向指針的指針一般佔用的不連續的內存。）