#include <STDLIB.H>
#include <STDIO.H>

#define OK 0
#define TRUE 1

typedef struct student
{
    int num;            //学号
    char name[20];        //姓名
    char sex;            //性别
    int age;            //年龄
    float score;        //分数
    char add[40];        //地址
};

typedef struct StudentNode
{
    struct student* stu_data;        //学生的数据信息指针
    struct StudentNode* next;            //指向下一个结点的指针
}StudentNode, *LinkStudentNode;

//创建具有n个学生信息的链表
int create_student_node_info(LinkStudentNode &stu_node, int n);

#include "student.h"

void case1(LinkStudentNode &stu_node)
{
    int n;
    printf("输入需要创建的学生信息的个数n:");
    scanf("%d", &n);
    create_student_node_info(stu_node, n);
}

void case2(LinkStudentNode stu_node)
{
    LinkStudentNode p;
    int i = 0;
    p = stu_node->next;//初始化p，使其指向第一个结点
    if(p)
    {
        //如果p不为NULL
        //打印其数据
        printf("第%d个学生信息:\n", i + 1);
        printf("学号:%d", p->stu_data->num);
        printf("姓名:%s", p->stu_data->name);
        printf("性别:%c", p->stu_data->sex);
        printf("年龄:%d", p->stu_data->age);
        printf("分数:%f", p->stu_data->score);
        printf("地址:%s", p->stu_data->add);
        p = p->next;
        i++;
    }
}

void main()
{
    int choice;
    LinkStudentNode stu_node;
    printf("1:创建具有n个学生信息的链表\n");
    printf("2:打印所有学生信息\n");
    printf("0:退出\n");

    while(TRUE)
    {
        printf("请输入您的选择:");
        scanf("%d", &choice);
        switch(choice)
        {
        case 0:exit(0);break;
        case 1:case1(stu_node);break;
        case 2:case2(stu_node);break;
        }
    }

    getchar();
}


//创建具有n个学生信息的链表
int create_student_node_info(LinkStudentNode &stu_node, int n)
{
    int i, nu;
    LinkStudentNode p;
    //给头指针stu_node分配内存空间
    stu_node = (LinkStudentNode)malloc(sizeof(StudentNode));
    stu_node->next = NULL;            //将头结点指向NULL，建立带头结点的链表            
    for(i = n; i > 0; --i)
    {
        p = (LinkStudentNode)malloc(sizeof(StudentNode));//生成新结点
        printf("输入一个学生信息\n");
        //输入元素信息
        printf("学号:");
        scanf("%d", &p->stu_data->num);
        printf("\n姓名:");
        scanf("%s", p->stu_data->name);
        printf("\n性别:");//注意此处性别是char型，默认其输入M为男，W为女吧
        scanf("%c", &p->stu_data->sex);
        printf("\n年龄:");
        scanf("%d", &p->stu_data->age);
        printf("\n分数:");
        scanf("%f", &p->stu_data->score);
        printf("\n地址:");
        scanf("%s", p->stu_data->add);
        //将当前指针指向NULL
        p->next = stu_node->next;
        //将当前结点插入到链表中
        stu_node->next = p;
    }
    return OK;
}