用C语言链表实现图书管理

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct ListNode {int val;//编号char title[50];//书名float price;//价格struct ListNode* next;
};// 在尾部插入节点
struct ListNode* insertAtTail(struct ListNode* head, int val,char mytitle[50],float price) {struct ListNode* new_node = (struct ListNode*)malloc(sizeof(struct ListNode));new_node->val = val;strcpy(new_node->title,mytitle);new_node->price=price;new_node->next = NULL;if (head == NULL) {return new_node;}struct ListNode* p = head;while (p->next != NULL) {p = p->next;}p->next = new_node;return head;
}
void listAll(struct ListNode* head){printf("编号\t书名\t价格\n");struct ListNode* p=head;while(p!=NULL){printf("%d\t%s\t%f", p->val, p->title, p->price);printf("\n");p=p->next;}
}
// 删除指定值的节点
struct ListNode* deleteNode(struct ListNode* head, int val) {struct ListNode* p = head;struct ListNode* prev = NULL;while (p != NULL && p->val != val) {prev = p;p = p->next;}if (p == NULL) {return head;}if (prev == NULL) {head = head->next;} else {prev->next = p->next;}free(p);return head;
}
// 修改指定值的节点的值
struct ListNode* modifyNode(struct ListNode* head, int old_val,char newTitle[50],float newPrice) {struct ListNode* p = head;while (p != NULL && p->val != old_val) {p = p->next;}if (p == NULL) {return head;}strcpy(p->title  ,newTitle);p->price = newPrice;return head;
}
// 查找指定值的节点的位置
int getIndexByVal(struct ListNode* head, int val) {struct ListNode* p = head;int i = 0;while (p != NULL && p->val != val) {p = p->next;i++;}if (p == NULL) {return -1;}return i;
}
int main(){struct ListNode* p=NULL;for (int i = 0; i < 100; i++){printf("%s", "1.插入图书\n");printf("%s", "2.删除图书\n");printf("%s", "3.图书列表\n");printf("%s", "4.修改图书\n");printf("%s", "请输入1或2或3或4：\n");int select;scanf("%d", &select);if (select == 1){int myVal;printf( "请输入编号：\n");scanf("%d", &myVal);printf( "请输入书名：\n");char myTitle[50];scanf("%s", myTitle);printf( "请输入价格：\n");float myPrice;scanf("%f",&myPrice);if(p==NULL){p=insertAtTail(NULL,myVal,myTitle,myPrice);}else{p=insertAtTail(p,myVal,myTitle,myPrice);}}else if(select==3){listAll(p);}else if(select==2){int deleteVal;printf("请输入要删除的图书的编号：\n");scanf("%d",&deleteVal);p=deleteNode(p,deleteVal);}else if(select==4){int modifyVal;printf("请输入要修改的图书的编号：\n");scanf("%d",&modifyVal);if(getIndexByVal(p,modifyVal)==-1){printf("图书不存在");continue;}printf( "请输入书名：\n");char modifyTitle[50];scanf("%s", modifyTitle);printf( "请输入价格：\n");float modifyPrice;scanf("%f",&modifyPrice);p=modifyNode(p,modifyVal,modifyTitle,modifyPrice);}}return 0;
}

要改成班级管理，ListNode中val不变，其它属性变成学生姓名、成绩等等。
注意：c语言的编译不要用visual studio，因为它连scanf都会报错，会要求您使用scanf_s。建议用记事本或visual studio code编写,然后在命令行窗口输入gcc命令来编译。