C语言期末/课程设计：图书借阅管理系统

#include <stdio.h> #include <stdlib.h> #include <string.h> // 定义学生信息结构体 typedef struct Student { int id; // 学号 char name[20]; // 姓名 char grade[10]; // 年级 int borrowed_book_id; // 借阅图书的编号 struct Student *next; // 指向下一学生的指针 } Student; // 定义图书信息结构体 typedef struct Book { int id; // 编号 char title[50]; // 书名 char author[20]; // 作者名 char publisher[50]; // 出版社 float price; // 价格 char publish_date[20]; // 出版时间 int is_borrowed; // 是否借出(0表示未借，1表示借出) int borrower_id; // 借书学生的编号 struct Book *next; // 指向下一图书的指针 } Book; // 初始化图书和学生链表的头结点 Book *book_head = NULL; Student *student_head = NULL; // 创建新的图书节点 Book* create_book(int id, const char *title, const char *author, const char *publisher, float price, const char *publish_date) { Book *new_book = (Book*)malloc(sizeof(Book)); new_book->id = id; strncpy(new_book->title, title, 49); new_book->title[49] = '\0'; // 确保字符串以空字符结尾 strncpy(new_book->author, author, 19); new_book->author[19] = '\0'; // 确保字符串以空字符结尾 strncpy(new_book->publisher, publisher, 49); new_book->publisher[49] = '\0'; // 确保字符串以空字符结尾 new_book->price = price; strncpy(new_book->publish_date, publish_date, 19); new_book->publish_date[19] = '\0'; // 确保字符串以空字符结尾 new_book->is_borrowed = 0; new_book->borrower_id = -1; // -1 表示没有借阅者 new_book->next = NULL; return new_book; } // 创建新的学生节点 Student* create_student(int id, const char *name, const char *grade) { Student *new_student = (Student*)malloc(sizeof(Student)); new_student->id = id; strncpy(new_student->name, name, 19); new_student->name[19] = '\0'; // 确保字符串以空字符结尾 strncpy(new_student->grade, grade, 9); new_student->grade[9] = '\0'; // 确保字符串以空字符结尾 new_student->borrowed_book_id = -1; // -1 表示没有借阅图书 new_student->next = NULL; return new_student; } // 添加图书到图书链表末尾 void add_book(Book *book) { if (book_head == NULL) { book_head = book; } else { Book *current = book_head; while (current->next != NULL) { current = current->next; } current->next = book; } } // 添加学生到学生链表末尾 void add_student(Student *student) { if (student_head == NULL) { student_head = student; } else { Student *current = student_head; while (current->next != NULL) { current = current->next; } current->next = student; } } // 打印图书信息 void printBook(Book* book) { if (book != NULL) { printf("编号: %d\n", book->id); printf("书名: %s\n", book->title); printf("作者: %s\n", book->author); printf("出版社: %s\n", book->publisher); printf("价格: %.2f\n", book->price); printf("出版时间: %s\n", book->publish_date); printf("是否借出: %d\n", book->is_borrowed); printf("借书学生ID: %d\n", book->borrower_id); } else { printf("未找到对应图书信息！\n"); } } // 打印所有图书信息 void print_books() { Book *current = book_head; char str[20]; printf("%-5s %-20s %-10s %-20s %-10s %-12s %-10s %-10s\n", "编号", "书名", "作者", "出版社", "价格", "出版时间", "是否借出", "借书学生ID"); printf("-----------------------------------------------------------------------------------------------------------\n"); while (current != NULL) { sprintf(str, "%d", current->borrower_id); printf("%-5d %-20s %-10s %-20s %-10.2f %-12s %-10s %-10s\n", current->id, current->title, current->author, current->publisher, current->price, current->publish_date, (current->is_borrowed)?"是":"否", (current->borrower_id==-1)?"无":str); current = current->next; } printf("\n"); } // 打印所有学生信息 void print_students() { Student *current = student_head; char str[20]; printf("%-5s %-10s %-10s %-20s\n", "学号", "姓名", "年级", "借阅图书编号"); printf("-------------------------------------------\n"); while (current != NULL) { sprintf(str, "%d", current->borrowed_book_id); printf("%-5d %-10s %-10s %-20s\n", current->id, current->name, current->grade, (current->borrowed_book_id==-1)?"无":str); current = current->next; } printf("\n"); } // 从文件读取图书数据并存入链表 void get_book(const char *filename) { FILE *file = fopen(filename, "r"); char line[256]; Book *book; if (!file) { perror("无法打开文件"); return; } while (fgets(line, sizeof(line), file)) { int id, is_borrowed, borrower_id; char title[50], author[20], publisher[50], publish_date[20]; float price; sscanf(line, "%d,%49[^,],%19[^,],%49[^,],%f,%19[^,],%d,%d", &id, title, author, publisher, &price, publish_date, &is_borrowed, &borrower_id); book = create_book(id, title, author, publisher, price, publish_date); book->is_borrowed = is_borrowed; book->borrower_id = borrower_id; add_book(book); } fclose(file); } // 将图书链表数据写入文件 void set_book(const char *filename) { FILE *file = fopen(filename, "w"); Book *current; if (!file) { perror("无法打开文件"); return; } current = book_head; while (current != NULL) { fprintf(file, "%d,%s,%s,%s,%.2f,%s,%d,%d\n", current->id, current->title, current->author, current->publisher, current->price, current->publish_date, current->is_borrowed, current->borrower_id); current = current->next; } fclose(file); } // 从文件读取学生数据并存入链表 void get_student(const char *filename) { FILE *file = fopen(filename, "r"); char line[256]; Student *student; if (!file) { perror("无法打开文件"); return; } while (fgets(line, sizeof(line), file)) { int id, borrowed_book_id; char name[20], grade[10]; sscanf(line, "%d,%19[^,],%9[^,],%d", &id, name, grade, &borrowed_book_id); student = create_student(id, name, grade); student->borrowed_book_id = borrowed_book_id; add_student(student); } fclose(file); } // 将学生链表数据写入文件 void set_student(const char *filename) { FILE *file = fopen(filename, "w"); Student *current = student_head; if (!file) { perror("无法打开文件"); return; } while (current != NULL) { fprintf(file, "%d,%s,%s,%d\n",current->id, current->name, current->grade, current->borrowed_book_id); current = current->next; } fclose(file); } void display_main(){ system("cls"); printf("==============================\n"); printf("| 欢迎使用图书借阅管理系统 |\n"); printf("==============================\n"); printf("| |\n"); printf("| 1.图书管理系统 |\n"); printf("| 2.学生管理系统 |\n"); printf("| 3.借阅系统 |\n"); printf("| 0.退出 |\n"); printf("| |\n"); printf("==============================\n"); } void display_book(){ system("cls"); printf("==============================\n"); printf("| 欢迎使用图书借阅管理系统 |\n"); printf("==============================\n"); printf("| |\n"); printf("| 1.显示图书信息 |\n"); printf("| 2.添加图书信息 |\n"); printf("| 3.查询图书信息 |\n"); printf("| 4.修改图书信息 |\n"); printf("| 5.删除图书信息 |\n"); printf("| 0.返回 |\n"); printf("|