C语言 - 图书管理系统

#include 
#include 
#include 
#include 

using namespace std;

int Adp; /// 管理员密码
int pdt; /// 比较密码
int cnt = 0; /// 图书当前本数
int N = 0; /// 记录用户数目
struct user /// 用户
{
    int id; /// 用户名
    int pd;  /// 密码
    char name[20];  /// 姓名
    int age;  /// 年龄
    int sex; /// 性别 1、男 2、女
    char tel[20]; /// 联系方式
} user[101];

struct book
{
    int num; /// 书号
    char name[20];  /// 书名
    char writer[20]; /// 作者
    char publish[20];  /// 出版社
    char publishtime[20]; /// 出版时间
    double price; ///价格
    int state; /// 借阅状态
} book[101];

/*
** 功能：保存用户信息
** 时间：17/7/8
*/
void saveUser()
{
    FILE *fp = fopen("user.txt", "w");
    for (int i = 1; i <= 100; i++)
    {
        if (strcmp(user[i].name, "") == 0)
            strcpy(user[i].name, "-");
        if (strcmp(user[i].tel, "") == 0)
            strcpy(user[i].tel, "-");
        fprintf(fp, "%d %d %s %d %d %s\n", user[i].id, user[i].pd, user[i].name, user[i].age, user[i].sex, user[i].tel);
    }
    fprintf(fp, "%d\n", N);
    fclose(fp);
}

/*
** 功能：读取用户信息
** 时间：17/7/8
*/
void loadUser()
{
    FILE *fp = fopen("user.txt", "r");
    for (int i = 1; i <= 100; i++)
    {
        fscanf(fp, "%d%d%s%d%d%s", &user[i].id, &user[i].pd, user[i].name, &user[i].age, &user[i].sex, user[i].tel);
    }
    fscanf(fp, "%d", &N);
    fclose(fp);
}

/*
** 功能：保存书籍信息
** 时间：17/7/8
*/
void saveBook()
{
    FILE *fp = fopen("book.txt", "w");
    for (int i = 1; i <= 100; i++)
    {
        if (strcmp(book[i].name, "") == 0)
            strcpy(book[i].name, "-");
        if (strcmp(book[i].writer, "") == 0)
            strcpy(book[i].writer, "-");
        if (strcmp(book[i].publish, "") == 0)
            strcpy(book[i].publish, "-");
        if (strcmp(book[i].publishtime, "") == 0)
            strcpy(book[i].publishtime, "-");
        fprintf(fp, "%d %s %s %s %s %lf %d\n", book[i].num, book[i].name, book[i].writer, book[i].publish, book[i].publishtime, book[i].price, book[i].state);
    }
    fprintf(fp, "%d\n", cnt);
    fclose(fp);
}

/*
** 功能：读取书籍信息
** 时间：17/7/8
*/
void loadBook()
{
    FILE *fp = fopen("book.txt", "r");
    for (int i = 1; i <= 100; i++)
    {
        fscanf(fp, "%d %s %s %s %s %lf %d\n", &book[i].num, book[i].name, book[i].writer, book[i].publish, book[i].publishtime, &book[i].price, &book[i].state);
    }
    fscanf(fp, "%d", &cnt);
    fclose(fp);
}

/*
** 功能：输入隐藏密码
** 时间：17/7/8
*/
int psWd()
{
    char ch;
    int num[6];
    int m=0;
    while(m<6)
    {
        ch=getch();
        num[m]=ch-'0';
        printf("*");
        m++;
    }
    int pwd=num[0]*100000+num[1]*10000+num[2]*1000+num[3]*100+num[4]*10+num[5];
    printf("\n");
    return pwd;
}

/*
** 功能：更改管理员密码
** 时间：17/7/8
*/
void ChangeAdp()
{
    while(true)
    {
        printf("\t\t\t     请输入六位新密码：\n\n");
        printf("\t\t\t");
        pdt = psWd();
        printf("\t\t\t       请确认密码：\n\n");
        printf("\t\t\t");
        Adp = psWd();
        if(pdt == Adp)
        {
            MessageBox (NULL,TEXT("密码修改成功！"), TEXT("Tips"),MB_OK);
            FILE * fp = fopen("admin.txt", "w");
            fprintf(fp, "%d", Adp);
            fclose(fp);
            return;
        }
        else
        {
            MessageBox (NULL,TEXT("两次密码输入不一致,请重新输入"), TEXT("Tips"),MB_OK);
        }
    }
}

/*
** 功能：提示
** 时间：17/7/8
*/
void Tips()
{
    int i;
    printf("\n\n\n\n\t\t==========================================\n\n");
    printf("\n\n\n\t\t\t\t正在初始化");
    for(i=0; i<=100; i++)
    {
        printf("%02d%%",i);
        Sleep(10);
        printf("\b\b\b");
    }
    printf("\n\n\t\t\t\t初始化成功\n");
    printf("\n\n\n\t\t==========================================\n\n");
    Sleep(1000);
    system("cls");
    MessageBox (NULL,TEXT("欢迎使用图书管理系统!"), TEXT("欢迎"),MB_OK);
    printf("\t\t==========================================\n\n");
    printf("\t\t||          欢迎使用图书管理系统        ||\n\n");
    printf("\t\t==========================================\n\n");
    if (access("admin.txt", 0))
    {
        printf("\t\t||        * 管理员请更改初始密码 *      ||\n\n");
        printf("\t\t==========================================\n\n");
        ChangeAdp();
    }
    else
    {
        FILE * fp = fopen("admin.txt", "r");
        fscanf(fp, "%d", &Adp);
        fclose(fp);
    }
}

/*
** 功能：系统选择界面
** 时间：17/7/8
*/
int systemChoose()
{
    system("cls");
    int choose;
    printf("\t\t===========================================\n\n");
    printf("\t\t||          欢迎使用图书管理系统         ||\n\n");
    printf("\t\t===========================================\n\n");
    printf("\t\t||              1 ==> 用户系统           ||\n\n");
    printf("\t\t||              2 ==> 管理员系统         ||\n\n");
    printf("\t\t||              0 ==> 退出               ||\n\n");
    printf("\t\t===========================================\n\n");
    printf("\t\t\t请选择您要登录的系统：");
    scanf("%d",&choose);
    return choose;
}

/*
** 功能：图书书号查重
** 时间：17/7/8
*/
int booknumCheck(int idt)
{
    int flag,i;
    flag = 1;
    for(i = 1; i <= cnt; i++)
    {
        if(book[i].num == idt)
        {
            flag = 0;
        }
        else
        {
            flag = 1;
        }
    }
    return flag;
}

/*
** 功能：用户ID查重
** 时间：17/7/11
*/
int useridCheck(int idt)
{
    int flag,i;
    flag = 1;
    for(i = 1; i <= N; i++)
    {
        if(user[i].id == idt)
        {
            flag = 0;
        }
        else
        {
            flag = 1;
        }
    }
    return flag;
}
void admSystem();
/*
** 功能：管理员系统の图书信息录入
** 时间：17/7/9
*/
void informationEntry()
{
    while(true)
    {
        system("cls");
        int choose;
        int num,i,flag; /// 如果flag == 1 则书号合法
        int idt;
        printf("\t\t===========================================\n\n");
        printf("\t\t||  欢迎使用图书管理系统の图书信息录入   ||\n\n");
        printf("\t\t===========================================\n\n");
        printf("\t\t\t请输入您要录入的图书本数：");
        scanf("%d",&num);
        for(i = 1; i <= num; i++)
        {
            while(true)
            {
                printf("\t\t\t请输入您要录入的图书书号：");
                scanf("%d",&idt);
                flag = booknumCheck(idt);
                if(flag == 1)
                {
                    ///MessageBox (NULL,TEXT("图书书号录入成功！"), TEXT("Tips"),MB_OK);
                    book[cnt+1].num = idt;
                    break;
                }
                else
                {
                    MessageBox (NULL,TEXT("图书书号已存在！请重新输入"), TEXT("Tips"),MB_OK);
                }
            }
            printf("\t\t\t请输入您要录入的图书书名：");
            scanf("%s",book[cnt+1].name);
            printf("\t\t\t请输入您要录入的图书作者：");
            scanf("%s",book[cnt+1].writer);
            printf("\t\t\t请输入您要录入的图书出版社：");
            scanf("%s",book[cnt+1].publish);
            printf("\t\t\t请输入您要录入的图书时间（XXXX.XX.XX）：");
            scanf("%s",book[cnt+1].publishtime);
            printf("\t\t\t请输入您要录入的图书价格：");
            scanf("%lf",&book[cnt+1].price);
            book[cnt+1].state = 0;
            MessageBox (NULL,TEXT("图书信息录入成功！"), TEXT("Tips"),MB_OK);
            printf("\t========================================================================\n\n");
            printf("\t|| 书号 || 书名 || 作者 || 出版社 || 出版时间 || 图书价格 || 借阅状态 ||\n\n");
            printf("\t|| %d || %s || %s || %s || %s || %lf || 未借出 ||\n\n",book[cnt+1].num,book[cnt+1].name,book[cnt+1].writer,book[cnt+1].publish,book[cnt+1].publishtime,book[cnt+1].price);
            printf("\t========================================================================\n\n");
            cnt++;
        }
        printf("\t\t==========================================\n\n");
        printf("\t\t||  是否继续？：                        ||\n\n");
        printf("\t\t||  1 ==> 继续                          ||\n\n");
        printf("\t\t||  0 ==> 退出                          ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t\t请选择：");
        scanf("%d",&choose);
        printf("Choose: %d\n", choose);
        if(choose == 0)
        {
            return;
            //admSystem();
        }
    }
}

/*
** 功能：管理员系统の图书信息浏览
** 时间：17/7/91
*/
void informationScan()
{
    int i;
    printf("\t\t******************************************\n\n");
    printf("\t\t||  欢迎使用图书管理系统の图书信息浏览  ||\n\n");
    printf("\t\t******************************************\n\n");
    if(cnt == 0)
    {
        MessageBox (NULL,TEXT("您未录入任何图书信息！"), TEXT("Tips"),MB_OK);
    }
    else
    {

        printf("\t\t============================================================\n\n");
        printf("\t\t||书号||书名||作者||出版社||出版时间||图书价格 ||借阅状态 ||\n\n");
        for(i = 1; i <= cnt; i++)
        {
            if(book[i].state == 1)
            {
                printf("\t\t|| %d || %s || %s || %s || %s || %.2f || 已借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
            }
            else
            {
                printf("\t\t|| %d || %s || %s || %s || %s || %.2f || 未借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
            }
        }
        printf("\t\t============================================================\n\n");
        system("pause");
        return;
        //admSystem();
    }
}

/*
** 功能：管理员系统の图书信息查询
** 时间：17/7/9
*/
void informationQuery()
{
    int a,flag;
    int i,choose;
    char na[20];
    char wr[20];
    printf("\t\t==========================================\n\n");
    printf("\t\t||  欢迎使用图书管理系统の图书信息查询  ||\n\n");
    printf("\t\t==========================================\n\n");
    printf("\t\t||  查找方式：                          ||\n\n");
    printf("\t\t||  1 ==> Search by name                ||\n\n");
    printf("\t\t||  2 ==> Search by writer              ||\n\n");
    printf("\t\t==========================================\n\n");
    while(true)
    {
        if(cnt == 0)
        {
            MessageBox (NULL,TEXT("您未录入任何图书信息！"), TEXT("Tips"),MB_OK);
            return;
        }
        else
        {
            flag = 0;
            printf("\t\t\t请选择您的查找方式：");
            scanf("%d",&choose);
            if(choose == 1)
            {
                printf("\t\t==========================================\n\n");
                printf("\t\t\t请输入您要查找的书名：");
                scanf("%s",na);
                for(i = 0; i <= cnt; i++)
                {
                    if(strcmp(book[i].name,na) == 0)
                    {
                        flag = 1;
                        if(book[i].state == 1)
                        {
                            printf("\t\t============================================================\n\n");
                            printf("\t\t||书号||书名||作者||出版社||出版时间||图书价格 ||借阅状态 ||\n\n");
                            printf("\t\t|| %d || %s || %s || %s || %s || %.2f || 已借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
                            printf("\t\t==========================================================\n\n");
                        }
                        else
                        {
                            printf("\t\t============================================================\n\n");
                            printf("\t\t||书号||书名||作者||出版社||出版时间||图书价格 ||借阅状态 ||\n\n");
                            printf("\t\t|| %d || %s || %s || %s || %s || %.2f || 未借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
                            printf("\t\t==========================================================\n\n");
                        }
                    }
                }
                if(flag == 0)
                {
                    MessageBox (NULL,TEXT("您查找的图书不存在！"), TEXT("Tips"),MB_OK);
                    return;
                }

            }
            else
            {
                printf("\t\t==========================================\n\n");
                printf("\t\t\t请输入您要查找的作者：");
                scanf("%s",wr);
                for(i = 0; i <= cnt; i++)
                {
                    flag = 1;
                    if(strcmp(book[i].writer,wr) == 0)
                    {
                        if(book[i].state == 1)
                        {
                            printf("\t\t============================================================\n\n");
                            printf("\t\t||书号||书名||作者||出版社||出版时间||图书价格 ||借阅状态 ||\n\n");
                            printf("\t\t|| %d || %s || %s || %s || %s || %.2f || 已借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
                            printf("\t\t==========================================================\n\n");
                        }
                        else
                        {
                            printf("\t\t============================================================\n\n");
                            printf("\t\t||书号||书名||作者||出版社||出版时间||图书价格 ||借阅状态 ||\n\n");
                            printf("\t\t|| %d || %s || %s || %s || %s || %.2f || 未借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
                            printf("\t\t==========================================================\n\n");
                        }
                    }
                }
                if(flag == 0)
                {
                    MessageBox (NULL,TEXT("您查找的图书不存在！"), TEXT("Tips"),MB_OK);
                    return;
                }
            }
            printf("\t\t==========================================\n\n");
            printf("\t\t||  是否继续？：                        ||\n\n");
            printf("\t\t||  1 ==> 继续                          ||\n\n");
            printf("\t\t||  0 ==> 退出                          ||\n\n");
            printf("\t\t==========================================\n\n");
            printf("\t\t\t请选择：");
            scanf("%d",&a);
            if(a == 0)
            {
                printf("\t\t\t感谢您的使用！\n\n");
                //admSystem();
                system("pause");
                return;
            }
        }
    }
}

/*
** 功能：管理员系统の图书信息删除
** 时间：17/7/9
*/
void informationDelete()
{
    int n,i;
    int a;
    printf("\t\t==========================================\n\n");
    printf("\t\t||  欢迎使用图书管理系统の图书信息删除  ||\n\n");
    printf("\t\t==========================================\n\n");
    while(true)
    {
        int flag = 0;
        if(cnt == 0)
        {
            MessageBox (NULL,TEXT("您未录入任何图书信息！"), TEXT("Tips"),MB_OK);
            break;
        }
        else
        {
            printf("\t\t\t请输入您要删除的图书书号：");
            scanf("%d",&n);
            for(i = 1; i < cnt; i++)
            {
                if(n == book[i].num)
                {
                    book[i] = book[i+1];
                    flag = 1;
                    cnt--;
                    printf("\n\t\t\t删除图书成功！\n\n");
                }
            }
            if(flag == 0)
            {
                MessageBox (NULL,TEXT("未找到匹配图书信息！"), TEXT("Tips"),MB_OK);
            }
        }
        printf("\t\t==========================================\n\n");
        printf("\t\t||  是否继续？：                        ||\n\n");
        printf("\t\t||  1 ==> 继续                          ||\n\n");
        printf("\t\t||  0 ==> 退出                          ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t\t请选择：");
        scanf("%d",&a);
        if(a == 0)
        {
            printf("\t\t\t感谢您的使用！\n\n");
            break;
        }
    }
}

/*
** 功能：管理员系统の图书信息修改
** 时间：17/7/9
*/
void informationChange()
{
    int i;
    printf("\t\t==========================================\n\n");
    printf("\t\t||  欢迎使用图书管理系统の图书信息修改  ||\n\n");
    printf("\t\t==========================================\n\n");
    while(true)
    {
        int flag = 0;
        if(cnt == 0)
        {
            MessageBox (NULL,TEXT("您未录入任何图书信息！"), TEXT("Tips"),MB_OK);
            break;
        }
        else
        {
            int iid;
            int a;
            printf("\t\t\t请输入所要修改的书籍的书号\n\n");
            printf("\t\t\tPlease Enter Your Choose : ");
            scanf("%d",&iid);
            for(i = 1; i <= cnt; i++)
            {
                if(book[i].num == iid)
                {
                    int choose;
                    printf("\t\t==========================================\n\n");
                    printf("\t\t||\t请选择您要修改的内容：              ||\n\n");
                    printf("\t\t||\t1 ==> 书名                          ||\n\n");
                    printf("\t\t||\t2 ==> 作者                          ||\n\n");
                    printf("\t\t||\t3 ==> 出版社                        ||\n\n");
                    printf("\t\t||\t4 ==> 出版时间                      ||\n\n");
                    printf("\t\t||\t5 ==> 图书价格                      ||\n\n");
                    printf("\t\t||\t0 ==> 退出                          ||\n\n");
                    printf("\t\t==========================================\n\n");
                    printf("\t\t\t请选择：");
                    scanf("%d",&choose);
                    if(choose == 1)
                    {
                        printf("\n\t\t\t请输入新的书名：");
                        scanf("%s",book[i].name);
                    }
                    else if(choose == 2)
                    {
                        printf("\n\t\t\t请输入新的作者名：");
                        scanf("%s",book[i].writer);
                    }
                    else if(choose == 3)
                    {
                        printf("\n\t\t\t请输入新的出版社名称：");
                        scanf("%s",book[i].publish);
                    }
                    else if(choose == 4)
                    {
                        printf("\n\t\t\t请输入新的出版时间：例如2017年7月8日请输入（2017.07.08）：");
                        scanf("%s",book[cnt+1].publishtime);
                    }
                    else if(choose == 5)
                    {
                        printf("\n\t\t\t请输入新的图书价格：");
                        scanf("%lf",&book[i].price);
                    }
                    flag = 1;
                    printf("\n\t\t\t图书信息修改成功！\n\n");
                    printf("\n\t\t\t当前图书信息显示：\n\n");
                    if(book[i].state == 1)
                    {
                        printf("\t\t============================================================\n\n");
                        printf("\t\t||书号||书名||作者||出版社||出版时间||图书价格 ||借阅状态 ||\n\n");
                        printf("\t\t\t|| %d || %s || %s || %s || %s || %lf || 已借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
                        printf("\t\t\t==========================================================\n\n");
                    }
                    else
                    {
                        printf("\t\t============================================================\n\n");
                        printf("\t\t||书号||书名||作者||出版社||出版时间||图书价格 ||借阅状态 ||\n\n");
                        printf("\t\t\t|| %d || %s || %s || %s || %s || %lf || 未借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
                        printf("\t\t\t==========================================================\n\n");
                    }
                    break;
                }
            }
            if(flag == 0)
            {
                MessageBox (NULL,TEXT("未找到匹配图书信息！"), TEXT("Tips"),MB_OK);
            }
            printf("\t\t==========================================\n\n");
            printf("\t\t||  是否继续？：                        ||\n\n");
            printf("\t\t||  1 ==> 继续                          ||\n\n");
            printf("\t\t||  0 ==> 退出                          ||\n\n");
            printf("\t\t==========================================\n\n");
            printf("\t\t\t请选择：");
            scanf("%d",&a);
            if(a == 0)
            {
                printf("\t\t\t感谢您的使用！\n\n");
                break;
            }
        }
    }
}

/*
** 管理员系统主界面
** 时间：17/7/8
*/
void admSystem()
{
    int choose;
    while (true)
    {
        system("cls");
        printf("\t\t==========================================\n\n");
        printf("\t\t||\t欢迎使用图书管理系统の管理员系统    ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t||         1 ==> 图书信息录入           ||\n\n");
        printf("\t\t||         2 ==> 图书信息浏览           ||\n\n");
        printf("\t\t||         3 ==> 图书信息查询           ||\n\n");
        printf("\t\t||         4 ==> 图书信息删除           ||\n\n");
        printf("\t\t||         5 ==> 图书信息修改           ||\n\n");
        printf("\t\t||         0 ==> 退出                   ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t\t请选择功能号：");
        scanf("%d",&choose);
        switch (choose)
        {
        case 1:
            informationEntry(); /// 图书信息录入
            saveBook();
            break;
        case 2:
            informationScan(); /// 图书信息浏览
            saveBook();
            break;
        case 3:
            informationQuery(); /// 图书信息查询
            break;
        case 4:
            informationDelete(); ///图书信息删除
            saveBook();
            break;
        case 5:
            informationChange(); ///图书信息修改
            saveBook();
            break;
        case 0:
            return ;
            break;
        }
    }
}

/*
** 功能：管理员登录界面
** 时间：17/7/8
*/
void admLogin()
{
    system("cls");
    printf("\t\t==========================================\n\n");
    printf("\t\t||   欢迎使用图书管理系统の管理员系统   ||\n\n");
    printf("\t\t==========================================\n\n");


    int j;
    for (j = 0; j < 3; j++)
    {
        printf("\t\t\t请输入您的密码：");
        pdt = psWd();
        if(pdt == Adp)
        {
            MessageBox (NULL,TEXT("登录成功！"), TEXT("Tips"),MB_OK);
            admSystem();
            return;
        }
        else
        {
            printf("\n\t\t\t密码错误！\n\t\t\t你还剩%d次输入密码的机会\n\n", 2 - j);
        }
    }
    if (j == 3)
    {
        MessageBox (NULL,TEXT("3次密码输入错误，退出！"), TEXT("Tips"),MB_OK);
        return;
    }
}
void userSystem();
/*
** 功能：用户系统の查询所有图书
** 时间：17/7/10
*/
void listBook()
{
    int i;
    printf("\t\t==========================================\n\n");
    printf("\t\t||    欢迎使用用户系统の查询所有图书    ||\n\n");
    printf("\t\t==========================================\n\n");

    if(cnt == 0)
    {
        MessageBox (NULL,TEXT("您未录入任何图书信息！"), TEXT("Tips"),MB_OK);
    }
    else
    {
        for(i = 1; i <= cnt; i++)
        {
            if(book[i].state == 1)
            {
                printf("\t\t============================================================\n\n");
                printf("\t\t||书号||书名||作者||出版社||出版时间||图书价格 ||借阅状态 ||\n\n");
                printf("\t\t|| %d || %s || %s || %s || %s || %lf || 已借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
                printf("\t\t==========================================================\n\n");
            }
            else
            {
                printf("\t\t============================================================\n\n");
                printf("\t\t||书号||书名||作者||出版社||出版时间||图书价格 ||借阅状态 ||\n\n");
                printf("\t\t|| %d || %s || %s || %s || %s || %lf || 未借出 ||\n\n",book[i].num,book[i].name,book[i].writer,book[i].publish,book[i].publishtime,book[i].price);
                printf("\t\t==========================================================\n\n");
            }
        }
        system("pause");
    }
    //userSystem();
}

/*
** 功能：用户系统の归还已借图书
** 时间：17/7/10
*/
void returnBook()
{
    int numt;
    int day,a;
    int i;
    printf("\t\t==========================================\n\n");
    printf("\t\t||   欢迎使用用户系统の归还已借图书     ||\n\n");
    printf("\t\t==========================================\n\n");
    while(true)
    {
        int flag = 0;
        printf("\t\t\t请输入您要归还的图书号：");
        scanf("%d",&numt);
        for(i = 1; i <= cnt; i++)
        {
            if(numt == book[i].num)
            {
                flag = 1;
                if(book[i].state == 0)
                {
                    MessageBox (NULL,TEXT("您已归还！请勿重复归还！"), TEXT("Tips"),MB_OK);
                }
                else
                {
                    book[i].state = 0;
                    printf("\t\t\t请输入您已借阅天数：");
                    scanf("%d",&day);
                    if(day <= 30)
                    {
                        printf("\t\t\t您的免费借阅天数还有 %d 天\n\n",30-day);
                    }
                    else
                    {
                        printf("您已逾期 %d 天，请缴纳 %.2f 元的逾期费用！\n\n",day-30,0.1*(day-30));
                    }
                    MessageBox (NULL,TEXT("归还成功！"), TEXT("Tips"),MB_OK);
                }
            }
        }
        if(flag == 0)
        {
            MessageBox (NULL,TEXT("未找到匹配书号的图书！"), TEXT("Tips"),MB_OK);
        }
        printf("\t\t==========================================\n\n");
        printf("\t\t||  是否继续？：                        ||\n\n");
        printf("\t\t||  1 ==> 继续                          ||\n\n");
        printf("\t\t||  0 ==> 退出                          ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t\t请选择：");
        scanf("%d",&a);
        if(a == 0)
        {
            printf("\t\t\t感谢您的使用！\n\n");
            break;
        }
    }
}

/*
** 功能：用户系统の租借现有图书
** 时间：17/7/10
*/
void rentBook()
{
    int numt;
    int a;
    int i;
    printf("\t\t==========================================\n\n");
    printf("\t\t||   欢迎使用用户系统の租借现有图书     ||\n\n");
    printf("\t\t==========================================\n\n");
    while(true)
    {
        int flag = 0;
        printf("\t\t\t请输入您要借阅的图书号：");
        scanf("%d",&numt);
        for(i = 1; i <= cnt; i++)
        {
            if(numt == book[i].num)
            {
                if(book[i].state == 1)
                {
                    MessageBox (NULL,TEXT("该图书已借出！"), TEXT("Tips"),MB_OK);
                }
                else
                {
                    flag = 1;
                    book[i].state = 1;
                    printf("\t\t====================Tips==================\n\n");
                    printf("\t\t||     * 您的免费借阅时间为 30 天 *     ||\n\n");
                    printf("\t\t||       * 逾期费用为每天 0.1 元 *      ||\n\n");
                    printf("\t\t==========================================\n\n");
                    MessageBox (NULL,TEXT("借阅成功！"), TEXT("Tips"),MB_OK);
                }
            }
        }
        if(flag == 0)
        {
            MessageBox (NULL,TEXT("未找到匹配书号的图书！"), TEXT("Tips"),MB_OK);
        }
        printf("\t\t==========================================\n\n");
        printf("\t\t||  是否继续？：                        ||\n\n");
        printf("\t\t||  1 ==> 继续                          ||\n\n");
        printf("\t\t||  0 ==> 退出                          ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t\t请选择：");
        scanf("%d",&a);
        if(a == 0)
        {
            printf("\t\t\t感谢您的使用！\n\n");
            return;
        }
    }
}
void userChoose();

/*
** 用户系统主界面
** 时间：17/7/10
*/
void userSystem()
{
    while(true)
    {
        system("cls");
        int choose;
        printf("\t\t==========================================\n\n");
        printf("\t\t||   欢迎使用图书借阅系统の用户系统     ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t||         1 ==> 查询所有图书           ||\n\n");
        printf("\t\t||         2 ==> 归还已借图书           ||\n\n");
        printf("\t\t||         3 ==> 租借现有图书           ||\n\n");
        printf("\t\t||         0 ==> 退出                   ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t\t请选择功能号：");
        scanf("%d",&choose);
        switch (choose)
        {
        case 1:
            listBook(); /// 查看所有图书
            break;
        case 2:
            returnBook(); /// 归还已借图书
            saveBook();
            break;
        case 3:
            rentBook(); /// 租借现有图书
            saveBook();
            break;
        case 0:
            //userChoose();
            return ;
            break;
        }
    }
}
/*
** 功能：用户登录界面
** 时间：17/7/10
*/
void userLogin()
{
    while(true)
    {
        system("cls");
        int idt;
        printf("\t\t==========================================\n\n");
        printf("\t\t||   欢迎使用图书借阅系统の用户系统     ||\n\n");
        printf("\t\t==========================================\n\n");
        if(N == 0)
        {
            MessageBox (NULL,TEXT("不存在注册用户！"), TEXT("Tips"),MB_OK);
            break;
        }
        int j = 1;
        int i;
        int flag = 0;
        printf("\t\t\t请输入您的用户名ID:");
        scanf("%d",&idt);
        for(i = 1; i <= N; i++)
        {
            /// 首先通过用户名找到对应的用户
            if(idt == user[i].id)
            {
                /// 验证用户输入的密码
                for (j = 0; j < 3; j++)
                {
                    printf("\t\t\t请输入您的密码：");
                    pdt = psWd();
                    if(pdt == user[i].pd)
                    {
                        MessageBox (NULL,TEXT("登录成功！"), TEXT("Tips"),MB_OK);
                        userSystem();
                        return;
                    }
                    else
                    {
                        printf("\n\t\t\t密码错误！\n\t\t\t你还剩%d次输入密码的机会\n\n", 2 - j);
                    }
                }
                if (j == 3)
                {
                    MessageBox (NULL,TEXT("3次密码输入错误，退出！"), TEXT("Tips"),MB_OK);
                    return;
                }
            }
        }
        if(flag)
        {
            MessageBox (NULL,TEXT("未找到该用户！"), TEXT("Tips"),MB_OK);
        }
    }
}

/*
** 功能：用户注册
** 时间：17/7/10
*/
void userSignin()
{
    while(true)
    {
        system("cls");
        int numt,sext;
        int pdt,choose;
        int flag;
        printf("\t\t==========================================\n\n");
        printf("\t\t||        欢迎使用用户系统の注册        ||\n\n");
        printf("\t\t==========================================\n\n");

        while(true)
        {
            printf("\t\t\t请输入您的注册ID：");
            scanf("%d",&numt);
            flag = useridCheck(numt);
            if(flag == 1)
            {
                printf("\t\t==========================================\n\n");
                printf("\t\t||            * 该用户ID可用 *          ||\n\n");
                printf("\t\t==========================================\n\n");
                user[N+1].id = numt;
                break;
            }
            else
            {
                printf("\t\t==========================================\n\n");
                printf("\t\t||    * 该用户ID已存在！请重新创建 *    ||\n\n");
                printf("\t\t==========================================\n\n");
                continue;
            }
        }
        while(true)
        {
            printf("\t\t==========================================\n\n");
            printf("\t\t\t请输入六位密码：\n\n");
            printf("\t\t\t");
            pdt = psWd();
            printf("\t\t\t请确认密码：\n\n");
            printf("\t\t\t");
            user[N+1].pd = psWd();
            if(pdt == user[N+1].pd)
            {
                printf("\t\t==========================================\n\n");
                printf("\t\t||            * 密码设置成功 *          ||\n\n");
                printf("\t\t==========================================\n\n");
                break;
            }
            else
            {
                printf("\n\t\t\t两次密码输入不一致!\n\t\t\t请重新输入\n\n");
            }
        }
        printf("\t\t\t请输入您的姓名：");
        scanf("%s",user[N+1].name);
        printf("\n\t\t\t请输入您的年龄：");
        scanf("%d",&user[N+1].age);
        printf("\n\t\t\t请输入您的性别：");
        printf("\n\n\t\t==========================================\n\n");
        printf("\t\t||               1 ==> 男               ||\n\n");
        printf("\t\t||               2 ==> 女               ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t\t请选择：");
        scanf("%d",&sext);
        if(sext == 1)
        {
            user[N+1].sex = 1;
        }
        else
        {
            user[N+1].sex = 2;
        }
        printf("\n\t\t\t请输入您的联系方式：");
        scanf("%s",user[N+1].tel);

        printf("\n\t\t================* 用 * 户 * 信 * 息 *=================\n\n");
        printf("\t\t||  用户ID  ||  姓名  ||  年龄  || 性别 || 联系方式 ||\n\n");
        if(user[N+1].sex == 1)
        {
            printf("\t\t||   %d   ||   %s   ||   %d   ||   男   ||   %s   ||\n\n",user[N+1].id,user[N+1].name,user[N+1].age,user[N+1].tel);
        }
        else
        {
            printf("\t\t||   %d   ||   %s   ||   %d   ||   女   ||   %s   ||\n\n",user[N+1].id,user[N+1].name,user[N+1].age,user[N+1].tel);
        }
        MessageBox (NULL,TEXT("注册成功！"), TEXT("Tips"),MB_OK);
        N++;
        saveUser();
        return;
        ///先删除掉这个我认为反人类的设计
        /**
        printf("\t\t==========================================\n\n");
        printf("\t\t||  是否继续？：                        ||\n\n");
        printf("\t\t||  1 ==> 继续                          ||\n\n");
        printf("\t\t||  0 ==> 退出                          ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t\t请选择：");
        scanf("%d",&choose);
        if(choose == 0)
        {
            printf("\t\t==========================================\n\n");
            printf("\t\t||              感谢您的使用            ||\n\n");
            printf("\t\t==========================================\n\n");
            break;
        }
        **/
    }
}

/*
** 功能：用户系统
** 时间：17/7/10
*/
void userChoose()
{
    int choose;
    while(true)
    {
        system("cls");
        printf("\t\t==========================================\n\n");
        printf("\t\t||   欢迎使用图书借阅系统の用户系统     ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t||              1 ==> 登录              ||\n\n");
        printf("\t\t||              2 ==> 注册              ||\n\n");
        printf("\t\t||              0 ==> 退出              ||\n\n");
        printf("\t\t==========================================\n\n");
        printf("\t\t\t请选择功能号：");
        scanf("%d",&choose);
        if(choose == 1)
        {
            userLogin();
        }
        else if(choose == 2)
        {
            userSignin();
        }
        else
        {
            printf("\n\t\t\t感谢您的使用！\n\n");
            return ;
        }
    }
}

/*
** 功能：主函数
** 时间：17/7/8
*/
int main()
{
    system("COLOR 4f");
    int systemTag;
    Tips();
    loadUser();
    loadBook();
    while(true)
    {
        systemTag = systemChoose(); /// 选择系统
        if(systemTag == 0)
        {
            printf("\t\t==========================================\n\n");
            printf("\t\t||           * 感谢您的使用 *           ||\n\n");
            printf("\t\t==========================================\n\n");
            system("pause");
            exit(0);
        }
        else if(systemTag == 1)
        {
            userChoose();
        }
        else
        {
            admLogin();
        }
    }
    return 0;
}