结构体套用二级指针

#define  _CRT_SECURE_NO_WARNINGS
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

/*
"name1111"
"name2222"
"name3333"
*/

typedef struct Teacher
{
//char student[10][30]
char name[64];
char *alisname;
char **stuname;
int age ;
int id;
}Teacher;

void printTeacher(Teacher *array, int num)
{
int i = 0;

for (i=0; i<num; i++)
{
printf("age:%d \n", array[i].age);
}
}

void sortTeacer(Teacher *array, int num)
{
int		i,j;
Teacher tmp;

for (i=0; i<num; i++)
{
for (j=i+1; j<num; j++)
{
if (array[i].age > array[j].age)
{
tmp = array[i];  //=号操作  赋值操作
array[i] = array[j];
array[j] = tmp;
}
}
}
}

Teacher * createTeacher01(int num)
{
Teacher * tmp = NULL;
tmp = (Teacher *)malloc(sizeof(Teacher) * num); //	Teacher		Array[3]
if (tmp == NULL)
{
return NULL;
}
return tmp; //

}

int createTeacher02(Teacher **pT, int num)
{
int i = 0, j = 0;
Teacher * tmp = NULL;
tmp = (Teacher *)malloc(sizeof(Teacher) * num); //	Teacher		Array[3]
if (tmp == NULL)
{
return -1;
}
memset(tmp, 0, sizeof(Teacher) * num);

for (i=0; i<num; i++)
{
char **p = NULL;

//malloc一级指针
tmp[i].alisname = (char *)malloc(60);

//二级指针的第三种内存模型
p = (char **)malloc(3 * sizeof(char *));  //打造二维内存
for (j=0; j<3; j++)
{
p[j] = (char *)malloc(120);
}
tmp[i].stuname = p; //

}

*pT = tmp;  //二级指针 形参 去间接的修改 实参 的值
return 0; //
}

void FreeTeacher(Teacher *p, int num)
{
int	i = 0, j = 0;
if (p == NULL)
{
return;
}
for (i=0; i<num; i++)
{
//释放一级指针
if (p[i].alisname != NULL)
{
free(p[i].alisname);
}

//释放二级指针
if (p[i].stuname != NULL)
{
char **myp = p[i].stuname;
for (j=0; j<3; j++)
{
if (myp[j] != NULL)
{
free(myp[j]);
}
}
free(myp);
p[i].stuname = NULL;
}
}
free(p);
}

void main()
{
int			ret = 0;
int			i = 0, j = 0;
//Teacher		Array[3];  //在stack 分配内存
int			num = 3;
Teacher *pArray = NULL;
ret = createTeacher02(&pArray, num);
if (ret != 0)
{
printf("func createTeacher02() er:%d \n ", ret);
return ;
}

for (i=0; i<num; i++)
{
printf("\nplease enter age:");
scanf("%d", & (pArray[i].age) );

//printf("\nplease enter name:");
//scanf("%s",  pArray[i].name ); //向指针所指的内存空间copy数据

printf("\nplease enter alias:");
scanf("%s",  pArray[i].alisname );  //向指针所指的内存空间copy数据

for (j=0; j<3; j++)
{
printf("please enter student name:");
scanf("%s",pArray[i].stuname[j] );
}
}

//打印老师年龄
// 	for (i=0; i<num; i++)
// 	{
// 		printf("age:%d \n", Array[i].age);
// 	}

printTeacher(pArray, num);

sortTeacer(pArray, num);

printf("排序之后\n");

printTeacher(pArray, num);

FreeTeacher(pArray, num);

printf("hello...\n");
system("pause");
return ;
}