gistfile1.hpp

#include <iostream>
#include <cstdlib>
#include <cstring>
#define BUFFERSIZE 256
// Integrated Development Environment
// Visual C++
using namespace std;
//
typedef struct DoublePointer
{
	char** p;
	// size of p
	size_t size;
	// Buffer Size of *p[]
	size_t BufferSize;
}SDP;
void reverse(SDP& buffer, size_t size, char** str);
void DestroyDoublePointer(SDP& buffer);
void main(int argc, char** argv)
{
	// Initialize double pointer of structure b
	SDP b;
	b.p = NULL;
	b.BufferSize = BUFFERSIZE;
	// Reverse and Allocate memory
	reverse( b, argc, argv);
	// display
	for (size_t i = 0; i < b.size; i ++)
	{
		cout<<" "<<b.p[i];
	}
	cout<<endl;
	// Free memory of double pointer
	DestroyDoublePointer(b);
	system("PAUSE");
}
void reverse(SDP& buffer, size_t size, char** str)
{
	if ( buffer.p != NULL )
	{
		return;
	}
	// Ignore program name
	buffer.size = size - 1;
	// Allocate memory of p
	buffer.p = (char**) calloc( buffer.size, sizeof(char*));
	// Allocate memory of p[]
	for (size_t i = 0; i < buffer.size; i ++)
	{
		buffer.p[i] = (char*)calloc( buffer.BufferSize, sizeof(char));
		strcpy( buffer.p[i], str[size - i - 1]);
	}
}
void DestroyDoublePointer(SDP& buffer)
{
	if ( buffer.p ==NULL )
	{
		return;
	}
	// Free memory of p[]
	for (size_t i = 0; i < buffer.size; i ++)
	{
		free(buffer.p[i]);
	}
	// Free memory of p
	free(buffer.p);
}