[学习记录]接口的封装和设计练习一

/*
        题目：
        //声明一个结构体类型
        struct _AdvTeacher
        {
            char    *name;
            char    *tile;
            int        age;
            char    *addr;
            char    *p1; //系统预留成员域
            char    **p2;//系统预留成员域
        };
        要求定义一个结构体数组（6个元素），要求从键盘输入数据，并按照名称大小进行排序；打印输出。
            1、    打印结构体数组，需要单独封装成函数；10
            2、    排序结构体数组，需要单独封装成函数（按照名称进行排序）；50
            3、    main函数中编写业务测试模型；40

            2014-04-22 19:59:31
            wirting by zhangshichuan.
*/
#include <iostream>

using namespace std;

#define  StructArrarySize 3               // 老师数量                         
#define  StudentNum 1                     // 每位老师的学生的数量             

typedef struct _AdvTeacher
{
    char    *name;
    char    *tile;
    int        age;
    char    *addr;
    char    **student;
}AdvTeacher;
                                                          
int CreateStructArray(AdvTeacher **, int, int);            //客户端初始化结构体数组
int FreeStructArray(AdvTeacher **, int, int);              //客户端释放结构体数组内存
int PrintStructArray(AdvTeacher*, int, int);              //客户端打印结构体数组元素
int SortStructArray(AdvTeacher*, int);                    //客户端对结构体数组元素排序

int main(void)
{
    int rv = 0;
    AdvTeacher * t = NULL;
    
    rv = CreateStructArray(&t, StructArrarySize, StudentNum);    //被调函数分配内存，甩出来
    if (rv != 0)
    {
        printf("func: CreateStructArray() _%d_error_
 ", rv);
        goto End;
    }

    for (int i = 0; i < StructArrarySize; ++i)                   // 客户端初始化赋值
    {
        printf("请输入第%d位老师的姓名: ", i+1);
        scanf("%s", t[i].name);
        printf("请输入第%d位老师的年龄: ", i+1);
        scanf("%d", &(t[i].age));
        printf("请输入第%d位老师的职务: ", i+1);
        scanf("%s", t[i].tile);
        printf("请输入第%d位老师的地址: ", i+1);
        scanf("%s", t[i].addr);
        for (int j = 0; j < StudentNum; ++j)
        {
            printf("请输入第%d位老师的第%d位学生的姓名: ", i+1, j+1);
            scanf("%s", t[i].student[j]);
        }
    }

    printf("排序前：
");
    rv = PrintStructArray(t, StructArrarySize, StudentNum);     // 打印
    if (rv != 0)
    {
        printf("func: PrintStructArray() _%d_error_
 ", rv);
        goto End;
    }

    rv = SortStructArray(t, StructArrarySize);      // 排序
    if (rv != 0)
    {
        printf("func: SortStructArray() _%d_error_
 ", rv);
        goto End;
    }

    printf("排序后：
");
    rv = PrintStructArray(t, StructArrarySize, StudentNum);     // 打印
    if (rv != 0)
    {
        printf("func: PrintStructArray() _%d_error_
 ", rv);
        goto End;
    }

End:
    rv = FreeStructArray(&t, StructArrarySize, StudentNum);
    if (rv != 0)
    {
        printf("致命错误: FreeStructArray()执行失败！
 _%d_error_
", rv);
    }


    system("pause");
    return rv;
}

// 创建结构体数组
int CreateStructArray(AdvTeacher **t, int structArrarySize, int studentNum)
{
    int rv = 0;
    if (NULL == t)
    {
        rv = -1;
        return rv;
    }
    
    AdvTeacher * temp = NULL;

    temp = (AdvTeacher *)malloc(structArrarySize * sizeof(AdvTeacher));
    if (NULL == temp)
    {
        rv = -2;
        return rv;
    }

    for (int i = 0; i < structArrarySize; ++i)
    {
        temp[i].name = (char *)malloc(256 * sizeof(char));
        temp[i].addr = (char *)malloc(256 * sizeof(char));
        temp[i].tile = (char *)malloc(256 * sizeof(char));

        if (NULL == temp[i].name || NULL ==temp[i].addr || NULL == temp[i].tile)
        {
            rv = -3;
            return rv;
        }

        temp[i].student = (char **)malloc(studentNum * sizeof(char *));
        if (NULL == temp[i].student)
        {
            rv = -4;
            return rv;
        }
        for (int j = 0; j < studentNum; ++j)                                  //创建学生内存块
        {
            (temp[i].student)[j] = (char *)malloc(256 * sizeof(char));
            if (NULL == (temp->student)[j])
            {
                rv = -5;
                return rv;
            }
        }
    }

    *t = temp;

    return rv;
}

// 销毁结构体数组
int FreeStructArray(AdvTeacher **t, int structArrarySize, int studentNum)
{
    int rv = 0;
    AdvTeacher *temp = *t;

    for (int i = 0; i < structArrarySize; ++i)
    {
        for (int j = 0; j < studentNum; ++j)                               // 销毁学生内存块
        {
            if (NULL != temp[i].student[j])
            {
                free(temp[i].student[j]);
            }
        }

        if (NULL != temp[i].addr && NULL != temp[i].name && NULL != temp[i].tile && NULL != temp[i].student)
        {
            free(temp[i].addr);
            free(temp[i].name);
            free(temp[i].tile);
            free(temp[i].student);
        }
    }

    if (NULL != temp)
    {
        free(temp);
        *t = NULL; //间接赋值  通过*(实参的地址)， 去间接修改实参的值 为null
    }
    
    return rv;
}

// 打印结构体数组
int PrintStructArray(AdvTeacher*t, int structArrarySize, int studentNum)
{
    int rv = 0;
    if (NULL == t)
    {
        rv = -1;
        return rv;
    }

    AdvTeacher *temp = t;

    for (int i = 0; i < structArrarySize; ++i)
    {
        printf("第%d位老师的姓名为：%s 
", i + 1, temp[i].name);
        printf("第%d位老师的年龄为：%d 
", i + 1, (temp[i].age));
        printf("第%d位老师的职务为：%s 
", i + 1, temp[i].tile);
        printf("第%d位老师的地址为：%s 
", i + 1, temp[i].addr);
        for (int j = 0; j < studentNum; ++j)
        {
            printf("第%d位老师的第%d位学生的姓名为：%s
", i + 1, j + 1, temp[i].student[j]);
        }
    }

    return rv;
}
// 排序结构体数组
int SortStructArray(AdvTeacher*t, int structArrarySize)
{
    int rv = 0;
    if (NULL == t)
    {
        rv = -1;
        return rv;
    }
    AdvTeacher *temp = t;

    for (int i = 0; i < structArrarySize; ++i)
    {
        for (int j = i + 1; j < structArrarySize; ++j)
        {
            if (0 > strcmp(temp[i].name, temp[j].name))
            {
                AdvTeacher tmp = temp[i];
                temp[i] = temp[j];
                 temp[j] = tmp;
            }
        }
    }

    return rv;
}

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