//struct#include <stdio.h>#include <stdlib.h>#include <string.h>typedef struct Student_st{    char name[10];    int  point;   struct Student_st *stu;} Student;void CheckIsLinkTable(Student *student){    Student *next = student->stu;    if (next == NULL) {        printf("查询失败,不是链式结构\n");        exit(0);    }}Student * CreateLink_Table(int num){    printf("num is %d\n",num);        Student * head,*current,*temp;    //分配内存    head = (Student *)malloc(sizeof(Student));    if (head == NULL) {        printf("内存分配失败 \n");        exit(0);    }        head ->name[0] = ‘\0‘;    head ->point = 0;    head -> stu = NULL;        temp = head;    for (int i = 0; i< num; i++) {        current = (Student *)malloc(sizeof(Student));        if (current == NULL) {            printf("内存分配失败 \n");            exit(0);        }        current ->stu = NULL;                printf("请输入第%d位学生姓名和成绩 如:name|89 \n",i+1);        char stuName[10] = "未知";        int student_point = 0;        char argValue[15] = "未知";                scanf("%s",argValue);                if (strstr(argValue,"|")==NULL) {            printf("请使用|分割内容 Y|N Y 重新输入,N 退出\n");            char content[5];            scanf("%s",content);            if (strcmp(content,"Y")==0) {                scanf("%s",argValue);            }else{                exit(0);            }        }                //分割字符串        char *token;        token = strtok(argValue,"|");        int i = 0;        while (token != NULL) {            if (i>0) {                student_point = atoi(token);                printf("%d\n",student_point);            }else{                ////char*的值赋给数组怎么做？----> c是常量指针，不可以改变，用                strncpy(stuName,token,sizeof(stuName));                printf("%s\n",token);            }                        token = strtok(NULL,"|");            i++;        }        strncpy(current->name,stuName,sizeof(current->name));        current ->point = student_point;                current->stu = NULL;        temp ->stu = current;        temp = current;            }        return head;}//查询void selectStudent(Student *student){    CheckIsLinkTable(student);    Student *next = student->stu;    int i =0;    while (next) {        printf("index %d; studentName is %s;  point is %d\n",i+1,next->name,next->point);        next = next ->stu;        i++;    }}//插入Student * insertStudentLinkTable(Student *student,char *insertContent){    //分割字符串    if (!insertContent) {        exit(0);    }        //分割字符串    char *token;    char stuName[10];    char preStuName[10];    int student_point;    token = strtok(insertContent,"|");    int i = 0;    while (token != NULL) {        if (i==1) {            ////char*的值赋给数组怎么做？----> c是常量指针，不可以改变，用            strncpy(stuName,token,sizeof(stuName));            printf("%s\n",token);        }else if(i==2){            student_point = atoi(token);            printf("%d\n",student_point);        }else{            strncpy(preStuName,token,sizeof(preStuName));            printf("%s\n",token);        }                token = strtok(NULL,"|");        i++;    }    Student *preStu;        CheckIsLinkTable(student);    //查找节点名字是否存在    Student *next = student->stu;    int ind = 0;    while (next) {        if ((next->name) && strcmp(preStuName,next->name)==0) {            printf("找到节点%s 位于第%d个节点 开始插入节点\n",preStuName,ind+1);            preStu = next;            break;        }        next = next->stu;        ind++;    }        Student *nextStu = preStu->stu;    //创建节点    Student *newStu = (Student *)malloc(sizeof(Student));    if (newStu==NULL) {        printf("分配内存失败");        exit(0);    }    strncpy(newStu->name,stuName,sizeof(char[10]));    newStu->point = student_point;    newStu->stu = nextStu;        preStu->stu = newStu;        //查询节点    selectStudent(student);    return student;}//反转Student *ReversionStudentLinkTable(Student *student){    CheckIsLinkTable(student);        Student *next,*current,*newLinkTable;    next = NULL;    current =NULL;    newLinkTable = NULL;    current = student->stu;    while (current) {        //保存游标节点 以后的节点        next = current->stu;        //断开游标节点后面的节点，并设置游标节点的后续节点为 新链表的第一个节点        current->stu = newLinkTable;        //保存当前游标节点 为新链表        newLinkTable = current;        //重置游标节点        current = next;    }        //给游标节点添加 头节点    Student *head = NULL;    head = (Student *)malloc(sizeof(Student));    head->name[0]=‘\0‘;    head->point = 0;    head->stu = newLinkTable;        return head;}

int main(void){    char sf[15];        /**     *  创建单向链表     */    int num;    printf ("请输入学生人数\n");    scanf("%d",&num);    Student *link_stu = CreateLink_Table(num);        /**     *  单向链表插入节点     */    printf ("请插入节点内容 在 已存在节点名字的后面，如 已存在节点名字|待插入名字|待插入分数 \n");    scanf("%s",sf);    link_stu = insertStudentLinkTable(link_stu,sf);        /**     *  反转单向链表     */    printf("反转链表Y|N \n");    scanf("%s",sf);    if (strcmp(sf,"Y")==0) {       Student *newLt= ReversionStudentLinkTable(link_stu);        //查询        selectStudent(newLt);    }
     return 0; 
}