1.录入书籍:将书籍录入图书管理系统
2.浏览书籍:查看图书管理系统里的所有书籍
3.借阅书籍:书籍存在可以借阅,库存-1,书的库存不足则无法借阅
4.归还书籍:库存+1,如果该书不是图书馆里的书籍,则无法录入
5.删除书籍:以书名为基础从图书管理系统中删除该书籍
6.查找书籍:按书名查找书籍,显示书籍的基本信息
7.排序书籍:按价格将书籍排序(降序)
使用函数、指针和链表编写。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 |
#include<stdio.h> #include<stdlib.h> #include<string.h>
struct bookinfo { char name[20]; //书名 char author[10]; //作者 char date[20]; //出版日期 float price; //价格 int num; //数量 };
struct Node { struct bookinfo data; struct Node* next; };
/*全局链表*/ struct Node* list = NULL;
/*创建表头*/ struct Node* createhead() { /*动态内存申请*/ struct Node* headNode = (struct Node*)malloc(sizeof(struct Node)); headNode->next = NULL; return headNode; }
/*创建节点*/ struct Node* createNode(struct bookinfo data) { struct Node* newNode = (struct Node*)malloc(sizeof(struct Node)); newNode->data = data; newNode->next = NULL; return newNode; }
void printList(); void display_menu(); void savebookfile(); void insertbook(); void readbookfile(); void deletebook(); struct Node* searchbook(); void sortbook(); void selectkey();
/*打印链表*/ void printList(struct Node* headNode) { struct Node* Bmove = headNode->next; printf("书名\t作者\t出版日期\t价格\t库存\n"); while(Bmove != NULL) { printf("%s\t%s\t%s\t%.1f\t%d\n",Bmove->data.name,Bmove->data.author,Bmove->data.date,Bmove->data.price,Bmove->data.num); Bmove = Bmove->next; }
}
/*菜单登录界面*/ void display_menu() { char str[100]; FILE *fp; char *txt; fp = fopen("menu.txt","r"); txt = fgets(str,100,fp); while(txt != NULL) { printf("%s",str); txt = fgets(str,100,fp); } fclose(fp); }
/*将信息存到文件中*/ void savebookfile(const char* filename,struct Node* headNode) { FILE* fp = fopen(filename,"w"); struct Node* Bmove = headNode->next; while(Bmove != NULL) { fprintf(fp,"%s\t%s\t%s\t%.1f\t%d\n",Bmove->data.name,Bmove->data.author,Bmove->data.date,Bmove->data.price,Bmove->data.num); Bmove = Bmove->next; } fclose(fp); }
/*录入书籍*/ void insertbook(struct Node* headNode,struct bookinfo data) { struct Node* newNode = createNode(data); newNode->next = headNode->next; headNode->next = newNode;
}
/*读取文件*/ void readbookfile(const char* filename, struct Node* headNode) { FILE* fp = fopen(filename,"r"); if(fp == NULL) { fp = fopen(filename,"w+"); } struct bookinfo tempinfo; while(fscanf(fp, "%s\t%s\t%s\t%.1f\t%d\n",tempinfo.name,&tempinfo.author,&tempinfo.date,&tempinfo.price,&tempinfo.num ) != EOF) { insertbook(list,tempinfo); } fclose(fp); }
/*删除书籍*/ void deletebook(struct Node* headNode,char *bookname) { struct Node* leftNode = headNode; struct Node* rightNode = headNode->next; while(rightNode != NULL && strcmp(rightNode->data.name,bookname)) { leftNode = rightNode; rightNode = leftNode->next; } if(leftNode == NULL) { return; } else { printf("删除书籍成功!\n"); leftNode->next = rightNode->next; free(rightNode); rightNode = NULL; } }
/*查找书籍*/ struct Node* searchbook(struct Node* headNode, char* bookname) { struct Node* rightNode = headNode->next; while (rightNode != NULL && strcmp(rightNode->data.name, bookname)) { rightNode = rightNode->next; } return rightNode; }
/*排序书籍*/ void sortbook(struct Node* headNode) { for(struct Node* i = headNode->next; i != NULL; i = i->next) { for(struct Node* j = headNode->next;j->next != NULL;j = j->next) { /*排序书籍(按价格降序)*/ if (j->data.price < j->next->data.price) { /*交换值*/ struct bookinfo tempdata = j->data; j->data = j->next->data; j->next->data = tempdata; } } } /*排序后查看效果*/ printList(headNode); }
/*交互界面*/ void selectkey() { int userkey = 0; struct bookinfo tempbook; //生成一个临时的变量存储书籍信息 struct Node* searchname = NULL; //生成一个临时变量存储查找的书名 struct Node* borrowbook = NULL; //生成一个临时变量存储要借阅的书名 struct Node* returnbook = NULL; //生成一个临时变量存储要归还的书名 scanf("%d",&userkey); switch(userkey) { case 1: printf("[ 录入书籍 ]\n"); printf("输入书籍的信息(name,author,date,price,num):"); scanf("%s%s%s%f%d",tempbook.name,&tempbook.author,&tempbook.date,&tempbook.price,&tempbook.num); insertbook(list,tempbook); /*把书籍信息保存到booksinfo文本文件里*/ savebookfile("bookinfo.txt",list); break; case 2: printf("[ 浏览书籍 ]\n"); printList(list); break; case 3: printf("[ 借阅书籍 ]\n"); /*书籍存在可以借阅,库存-1,书的库存不足则无法借阅*/ printf("请输入要借阅的书名:"); scanf("%s",tempbook.name); borrowbook = searchbook(list,tempbook.name); if(borrowbook == NULL) { printf("不存在该书,无法借阅!\n"); } else { if(borrowbook->data.num > 0) { borrowbook->data.num--; printf("借阅成功!\n"); printList(list); } else { printf("当前书籍库存不足,借阅失败!\n"); } } break; case 4: printf("[ 归还书籍 ]\n"); //库存+1 printf("请输入要归还的书名:"); scanf("%s",tempbook.name); returnbook = searchbook(list,tempbook.name); if(returnbook == NULL) { printf("该书不是图书馆里的书籍!\n"); } else { returnbook->data.num++; printf("书籍归还成功!\n"); printList(list); } break; case 5: printf("[ 删除书籍 ]\n"); printf("请输入要删除的书名:"); scanf("%s",tempbook.name); deletebook(list,tempbook.name); /*按书名删除书籍*/ printList(list); break; case 6: printf("[ 查找书籍 ]\n"); printf("请输入要查询的书名:"); scanf("%s",tempbook.name); searchname = searchbook(list,tempbook.name); if(searchname == NULL) { printf("不存在该书,请加购录入!\n"); } else { /*输出该书的信息*/ printf("书名\t作者\t出版日期\t价格\t库存\n"); printf("%s\t%s\t%s\t%.1f\t%d\n",searchname->data.name,searchname->data.author,searchname->data.date,searchname->data.price,searchname->data.num); } break; case 7: printf("[ 排序书籍 ]\n"); /*按价格排序(降序)*/ sortbook(list); break;
case 8: printf("[ 退出系统 ]\n"); printf("退出成功\n"); system("pause"); exit(0); /*关闭整个程序*/ break; default: printf("[ 错误 ]\n"); break; } }
/*主界面*/ int main() { list = createhead(); readbookfile("bookinfo.txt",list); while(1) { display_menu(); selectkey(); system("pause"); system("cls"); } system("pause"); return 0; } |
1.录入书籍
2.浏览书籍
3.借阅书籍
存在该书时,借阅成功,库存-1:
不存在该书时,无法借阅:
4.归还书籍
当图书管理系统里本不存在该书,则归还失败:
5.查找书籍
不存在该书时,则查找失败:
6.排序书籍
再录入书籍:
排序(降序):
7.删除书籍
以上为该程序的所有功能。