C小程序—二级指针的第三种内存模型代码实例

c小程序—二级指针的第三种内存模型代码实例

#include "stdio.h"
#include "string.h"
#include "stdlib.h"

int printaarray03(char **  parray, int num)
{
	int i = 0;


	if (parray == null)
	{
		return -1;
	}


	for (i=0; i 0)
			{
				//交换的是数组元素 数组元素是指针
				tmp = parray[i];
				parray[i] = parray[j];
				parray[j] = tmp;
			}
		}
	}
}




void main()
{
	int i = 0, j = 0;
	char **parray = null;
	char *tmp = null;
	//构造内存
	parray = (char **)malloc(100*sizeof(char *)); //int parray[100];
	parray[0] = (char *)malloc(12*sizeof(char)); //char buf[12];
	parray[1] = (char *)malloc(200*sizeof(char)); //char buf[200];
	parray[2] = (char *)malloc(200*sizeof(char)); //char buf[200];
	parray[3] = (char *)malloc(200*sizeof(char)); //char buf[200];


	strcpy(parray[0], "cccccc");
	strcpy(parray[1], "aaaa");
	strcpy(parray[2], "bbbb");
	strcpy(parray[3], "11111");

	 printaarray03(parray, 4);

	 sortarray03(parray, 4);

	printf("第三种内存排序之后\n");
	 printaarray03(parray, 4);




	//释放内存
	for (i=0; i<4; i++)
	{
		if (parray[i] != null)
		{
			free(parray[i]);
		}
	}
	if (parray != null) 
	{
		free(parray);
	}


	system("pause");
}