结构体做函数参数2

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

typedef struct Teacher
{
    char name[64];
    int age;
    int id;
}Teacher;

void printTeacher(Teacher *array, int num)
{
    int i = 0;
    //打印老师年龄
    for (i = 0; i < num; i++)
    {
        //printf("age:%d
", array[i].age);
        printf("age:%d
", (*(array + i) ).age);
        //(array++)->age;
    }
}//(*(array+i)).age

void sortTeacher(Teacher *array,int num)
{
    int i, j;
    Teacher tmp;
    for (i = 0; i < num;i++)
    {
        for (j = i; j < num;j++)
        {
            if (array[i].age<array[j].age)
            {
                tmp = array[i];
                array[i] = array[j];
                array[j] = tmp;
            }
        }
    }
}


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

void FreeTeacher(Teacher *p)
{
    if (p!=NULL)
    {
        free(p);
    }
}

int main()
{
    int i = 0;
    int num = 3;
    //Teacher Array[3];    //在stack分配内存

    Teacher *pArray = NULL;
    pArray = createTeacher(num);

    for (i = 0; i < num; i++)
    {
        printf("
please enter age:");
        scanf("%d", &pArray[i].age);
    }
    printTeacher(pArray, num);
    sortTeacher(pArray, num);
    printf("排序后：
");
    printTeacher(pArray, num);
    /*
        printTeacher(Array, num);
        sortTeacher(Array, num);
        printf("排序后：
");
        printTeacher(Array, num);*/
    FreeTeacher(pArray);
    system("pause");
    return 0;
}