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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/*
系統名稱：圖書管理系統
系統功能：增加圖書刪除圖書查找圖書查看圖書借書還書個人借書情況等
作者：陳銀虎
完成時間：2019年11月19日
*/
struct Book
{
char name[32]; //書名
int count; //本數
int flag; //是否可借 1表示可借
};
typedef struct Book book;
struct Student
{
char name[32]; //學生名
int id; //學生學號
char *book[5]; //已經借的書
int count; //借的本數
};
typedef struct Student stu;
book *g_book[1024] = {0}; //圖書館所有書
stu *g_student[1024] = {0}; //圖書館記錄的所有借書的學生
int g_BookCount = 0; //圖書館書的本數
int g_StudentCount = 0; //借書的人數
void menu()
{
system("clear");
printf("\t\t-----------------------------------------------\n");
printf("\t\t 1、增加圖書 2、刪除圖書\n");
printf("\t\t 3、查看圖書 4、查找圖書\n");
printf("\t\t 5、借書 6、還書\n");
printf("\t\t 7、借書情況 8、退出系統\n");
printf("\t\t----------------------------------------------\n");
}
/*
函數描述：圖書館初始化，存放一些圖書
函數參數：無
函數返回值：無
*/
void init()
{
int i;
for (i = 0; i < 9; i++)
{
g_book[i] = (book *)malloc(sizeof(book) * 1);
if (NULL == g_book[i])
{
printf("mallco failrue!\n");
}
g_book[i]->flag = 1; //表示可借
g_BookCount++;
}
strcpy(g_book[0]->name, "數學");
strcpy(g_book[1]->name, "英語");
strcpy(g_book[2]->name, "語文");
strcpy(g_book[3]->name, "思想品德");
strcpy(g_book[4]->name, "歷史");
strcpy(g_book[5]->name, "馬克思主義");
strcpy(g_book[6]->name, "C語言");
strcpy(g_book[7]->name, "單片機");
strcpy(g_book[8]->name, "嵌入式");
g_book[0]->count = 3;
g_book[1]->count = 5;
g_book[2]->count = 1;
g_book[3]->count = 3;
g_book[4]->count = 5;
g_book[5]->count = 10;
g_book[6]->count = 2;
g_book[7]->count = 15;
g_book[8]->count = 7;
}
/*
函數描述：顯示圖書館所有書本
函數參數：無
函數返回值：無
*/
void ShowBook()
{ printf("\t\t借閱情況：\n");
printf("\t\t圖書館總藏書數：%d\n",g_BookCount);
printf("\t\t總借閱人數：%d\n",g_StudentCount);
printf("\t\t書本情況：\n");
int i;
for (i = 0; i < g_BookCount; i++)
{
printf("\t\t 書名：%s 本數 %d 是否可借 %s\n", g_book[i]->name, g_book[i]->count,
(g_book[i]->flag == 1) ? "可借" : "不可借");
}
printf("\n");
printf("\t\t具體個人的借閱情況請在返回主菜單后到借閱情況\n");
sleep(4);
}
/*
函數描述: 查詢圖書館的所有書本
函數參數：無
函數返回值：無
*/
void SearchBook()
{ char s[32]={0};
printf("\t\t輸入你要查詢的書名：\n");
scanf("%s",s);
int i=TraverseBook(s);
if (i == -1) //未查詢到結果
{
printf("\t\t圖書館內無此書！\n");
return;
}
else
{
if (g_book[i]->flag == 1) //可借
{
printf("\t\t可借，還有%d本。\n",g_book[i]->count);
}
else
{
printf("\t\t此書已被借完！\n"); //不可借
}
}
}
/*
函數描述：根據id查找學生是否存在
函數參數：學號
函數返回值：學生存在返回下標學生不存在返回-1
*/
int TraverseStudent(int id)
{
int i;
for (i = 0; i < g_StudentCount; i++)
{
if (id == g_student[i]->id)
{
// printf("存在！"); //調試用
return i;
}
}
return -1;
}
/*
函數描述：根據書名判斷書是否存在
函數參數：書名
函數返回值：存在則返回書本的下標，不存在返回-1
*/
int TraverseBook(char *n)
{
int i;
for (i = 0; i < g_BookCount; i++)
{
if (strcmp(n, g_book[i]->name) == 0)
{
return i;
}
}
return -1;
}
/*
函數描述：增加書籍
函數參數：無
函數返回值：無
*/
void AddBook()
{
printf("\t\t請輸入要增加的書籍名稱：\n");
char name[32] = {0};
int num;
scanf ("%s",name);
//判斷書籍是否已經存在
int result = TraverseBook(name);
if (result != -1)
{
printf("\t\t該書已存在，請輸入你要增加的數量：\n");
scanf("%d",&num);
g_book[result]->count +=num;
printf("書籍增加成功,該書現在有%d本\n",g_book[result]->count);
return;
}
//書籍不存在，分配空間
else
{ g_BookCount ++;
g_book[g_BookCount - 1] = (book *)malloc(sizeof(book)*1);
if (NULL == g_book[g_BookCount - 1])
{
printf("malloc failure!\n");
}
g_book[g_BookCount -1]->flag = 1;
}
strcpy(g_book[g_BookCount -1]->name,name);
printf("\t\t請輸入要增加的本數：\n");
scanf ("%d",&num);
g_book[g_BookCount - 1]->count = num;
printf("\t\t增加成功，該書現在有%d本\n",num);
return;
}
/*
函數描述：刪除輸入的書目
函數參數：無
函數返回值：無
*/
void DeleteBook()
{
int i,result=0;
printf("\t\t請輸入要刪除的書目：\n");
char name[32]={0};
scanf ("%s",name);
result = TraverseBook(name);
if (-1 == result)
{
printf("\t\t書本不存在，刪除失敗！\n");
return ;
}
else
{
for (i = result;i < g_BookCount;i++)
{
g_book[i] = g_book[i+1];
}
g_BookCount--;
printf("\t\t刪除成功！\n");
}
}
/*
函數描述：借書部分
函數參數：無
函數返回值：無
*/
void BorrowBook()
{
int id = 0;
printf("\t\t請輸入學號：\n");
scanf("%d", &id);
//遍歷g_student數組，判斷學生是否借過書
int result = TraverseStudent(id); //判斷id是否存在
int sturesult = result;
if (result == -1) //不存在，給新的學生申請內存
{
g_StudentCount ++;
g_student[g_StudentCount - 1] = (stu *)malloc(sizeof(stu) * 1);
if (NULL == g_student[g_StudentCount - 1])
{
printf("malloc fialure!\n");
return;
}
printf("\t\t要借哪本書：\n");
char name[32] = {0};
scanf("%s", name);
//判斷書在不在
result = TraverseBook(name);
if (-1 == result) //書本不存在
{
printf("\t\t書本不存在,借書失敗\n");
return;
}
else //書本存在
{
if (g_book[result]->flag == 0)
{
printf("\t\t該書已經被借完！\n");
}
else
{
g_book[result]->count--;
if (0 == g_book[result]->count)
{
g_book[result]->flag = 0; //書本不可借
}
g_student[g_StudentCount - 1]->id = id; //記錄學生的學號
g_student[g_StudentCount - 1]->book[g_student[g_StudentCount - 1]->count] = (char *)malloc(sizeof(char) * 128);
if (NULL == g_student[g_StudentCount - 1]->book)
{
printf("malloc failure!\n");
return;
}
strcpy(g_student[g_StudentCount - 1]->book[g_student[g_StudentCount - 1]->count], name); //保存書名
g_student[g_StudentCount - 1]->count++; //借書的本數加一
printf("\t\t借書成功\n");
}
}
}
//存在判斷借書是否達到上限
else
{
if (g_student[sturesult]->count == 5 )
{
printf("借書已達上限！\n");
return;
}
else
{
printf("\t\t要借哪本書？\n");
char name1[32]={0};
scanf("%s",name1);
//判斷書是否存在
int result1 = TraverseBook(name1);
{
if (-1==result1)//書本不存在
{
printf("\t\t書本不存在，借書失敗！\n");
return;
}
else
{ if (g_book[result1]->flag == 0 )
{
printf("\t\t該書已經被借完！\n");
}
else
{ //書本存在
g_book[result1]->count--;
if (0 == g_book[result1]->count)
{
g_book[result]->flag = 0; //書本不可借
}
// printf("\t\t測試段錯誤用\n");
//給這個學生的書名分配內存
g_student[sturesult]->book[g_student[sturesult]->count] = (char*)malloc(sizeof(char)*128);
if (NULL == g_student[sturesult]->book)
{
printf("malloc failure!\n");
return;
}
strcpy(g_student[sturesult]->book[g_student[sturesult]->count],name1);
/*sturesult: 由于前部分result一開始代表的是學號下標，后來改成了書名下標，這里取學號下標保存 */
g_student[sturesult]->count++;
printf("\t\t借書成功！\n");
}
}
}
}
}
}
/*
函數描述：根據學號以及書名確定還書情況
函數參數：無
函數返回值：無
*/
void Payback()
{
int id,sturesult,bookresult=-1,i;
char name[32] = {0};
printf("\t\t請輸入學號：\n");
scanf("%d",&id);
//判斷學號是否存在
sturesult = TraverseStudent(id);
if (sturesult == -1)
{
printf("\t\t學號有誤！\n");
return;
}
else
{
printf("\t\t你要還哪本書？\n");
scanf ("%s",name);
//判斷書是否存在
for(i = 0;i < g_student[sturesult]->count;i++)
{ //判斷書名與所借書名是否相同
if (strcmp(name,g_student[sturesult]->book[i]) == 0)
{
bookresult = i;
break;
}
}
if ( bookresult == -1)
{
printf("\t\t你沒有借過這本書!\n");
}
else
{
//學生書名刪除
for (i = bookresult;i<g_student[sturesult]->count;i++)
{
g_student[sturesult]->book[i]=g_student[sturesult]->book[i+1];
}
g_student[sturesult]->count--;//學生借書冊數減一
int x = TraverseBook(name);
g_book[x]->count++; //圖書館書加一
printf("\t\t還書成功！\n");
}
}
}
/*
函數描述：根據輸入學號查看該學生的借書情況
函數參數：無
函數返回值：無
*/
void Status()
{
int id,result,i;
printf("\t\t請輸入你的學號：\n");
scanf("%d",&id);
result= TraverseStudent(id);
if (-1 == result)
{
printf("\t\t該學號不存在！\n");
}
else
{
printf("\t\t借書數量：%d\n",g_student[result]->count);
for(i = 0;i < g_student[result]->count;i++)
{
printf("\t\t書名：%s\n",g_student[result]->book[i]);
}
}
}
int main()
{
char choice[2] = {0};
init();
while (1)
{
menu();
scanf("%s", choice);
switch(choice[0])
{
case '1':
AddBook();
sleep(4);
break;
case '2':
DeleteBook();
sleep(4);
break;
case '3':
ShowBook();
break;
case '4':
SearchBook();
sleep(4);
break;
case '5':
BorrowBook();
sleep(4);
break;
case '6':
Payback();
sleep(4);
break;
case '7':
Status();
sleep(4);
break;
case '8':
exit(0);
break;
}
}
return 0;
}

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