/**
  C语言课程设计题目: 服装销售管理系统

  系统要求: 包含三类用户,管理员,店长,销售员
        管理员功能:            
                (1)自身密码修改
                (2)用户信息管理:添加,修改,查询,删除
                (3)商品信息管理:添加,修改,查询,删除
                (4)销售报表显示:日报表,月报表,商品销售量报表,销售员业绩报表
                (5)退出登陆系统
        店长功能:
                (1)自身密码修改
                (2)商品信息管理:添加,修改,查询,删除
                (3)销售报表显示:日报表,月报表,商品销售量报表,销售员业绩报表
                (4)退出登陆系统
        销售员功能:
                (1)商品查询浏览,商品销售
                (2)自己销售报表显示：日报表，月报表
                (3)退出登陆系统
**************************************************
    程序作者: 双鱼林  作者真实姓名:  汪建林
    生日: 1985年2月26日 星座: 双鱼座
    血型: 0  家乡: 四川达州
    QQ: 287307421 手机:13558690869
***************************************************
**/

#include <stdio.h>
#include <windows.h>
#include <time.h>

#define ADMIN_USER_TYPE 1
#define BOSS_USER_TYPE 2
#define SELL_USER_TYPE 3


#define FUNCTION_FAILED -1
#define FUNCTION_SUCCESS 0

/** 系统用户结构 **/
typedef struct SystemUser {
    char userName[20];                        //用户名,主键
    char password[20];                        //用户密码
    int  userType;                                //用户类型(1:管理员；2:店长；3:销售员)
    struct SystemUser *next;            //指向下一个用户的指针
} SystemUser;

/** 服装商品信息 **/
typedef struct Products {
    int productId;                                //商品编号,主键
    char productName[20];                    //商品名称
    char productType[20];                    //商品型号
    char productCompany[20];            //商品厂家
    float productPrice;                        //商品价格
    int productCount;                            //商品数量
    char memo[50];                                //商品附加信息
    struct Products *next;                //指向下一个商品的指针
} Products;

/** 销售记录信息结构 **/
typedef struct SellInfoRecord {
    int saleId;                                        //销售编号,主键
    char userName[20];                        //销售商品的用户名
    int productId;                                //销售的商品编号
    int sellCount;                                //销售数量
    int year;                                            //销售商品年份
    int month;                                        //销售商品月份
    int day;                                            //销售商品日期
    char memo[50];                                //销售的附加信息
    struct SellInfoRecord *next;    //下一条销售记录
} SellInfoRecord;

static char currentUser[20];                                    //系统全局变量,保存当前登陆用户名;
static int currentUserType;                                        //系统全局变量,保存当前登陆用户的用户类型

static SystemUser *pSystemUserHead = NULL;        //保存系统用户信息记录的头指针
static Products *pProductHead = NULL;                    //保存系统商品信息记录的头指针
static SellInfoRecord *pSellInfoHead = NULL;    //保存系统销售记录的头指针

void InitSystem();                                        //对系统用户信息和商品信息进行初始化
int AddUser(SystemUser *);                        //向用户信息链表中加入用户信息
int AddProduct(Products *pPro);            //向商品信息链表中加入商品信息
int AddSellInfo(SellInfoRecord *);
void WelcomeMenu();                                        //系统欢迎菜单
void SystemLogin();                                        //系统登陆
void AdminOperationMenu();                        //系统管理员操作菜单
void BossOperationMenu();                            //店长操作菜单
void SellOperationMenu();                            //销售员操作菜单
void ChangePassword();                                //修改密码
void UserManage();                                        //用户信息管理
    void UserInfoView();                                //用户信息查看
    void UserInfoAdd();                                    //用户信息添加
    void UserInfoModify();                            //用户信息修改
    void UserInfoDelete();                                //用户信息删除
void ProductsManage();                                //产品信息管理
    void ProductsView();                                //商品查看
    void ProductFind();
    void InputAndAddProduct();                    //输入商品信息并添加
    void ModifyProduct();                                //修改商品信息
    void DeleteProduct();                                //删除商品信息
    void ProductsSell();                                    //商品销售

void ReportPrint();                                        //报表显示
    void ShowAllSellReport();                            //显示所有商品销售情况
    void ShowDaySellReport();                            //显示某日的销售情况
    void ShowMonthSellReport();                                //显示某月的销售情况
    void ShowEmployeeSellReport();                        //显示某个销售员的销售情况
void ExitSystem();                                        // 退出登陆系统

float getPriceById(int );                            //通过商品编号查询商品价格
int getProductNameById(int,char *);        //通过商品编号查询商品名称
int getCountById(int);                                //通过商品编号查询商品库存数量
void ReduceProductCount(int,int);            //通过商品编号减少商品数量


/** 对系统进行初始化,建立用户记录和商品记录 **/
void InitSystem() {
    SystemUser adminUser,bossUser,sellUser;            //管理员,店长,销售员三个角色信息
    Products products[2];                                                //初始化两件服装商品信息
    SellInfoRecord sellInfo[2];                                    //初始化两条销售记录

    strcpy(adminUser.userName,"admin");
    strcpy(adminUser.password,"admin");
    adminUser.userType = ADMIN_USER_TYPE;
    adminUser.next = NULL;

    strcpy(bossUser.userName,"boss");
    strcpy(bossUser.password,"boss");
    bossUser.userType = BOSS_USER_TYPE;
    bossUser.next = NULL;

    strcpy(sellUser.userName,"sell");
    strcpy(sellUser.password,"sell");
    sellUser.userType = SELL_USER_TYPE;
    sellUser.next = NULL;

    AddUser(&adminUser);
    AddUser(&bossUser);
    AddUser(&sellUser);



    //products[0].productId = 1;
    strcpy(products[0].productName,"休闲男装");
    strcpy(products[0].productType,"SUN001");
    strcpy(products[0].productCompany,"太阳服装制造厂");
    products[0].productPrice = 23.5;
    products[0].productCount = 100;
    strcpy(products[0].memo,"好服装,太阳造");
    products[0].next = NULL;

    //products[1].productId = 2;
    strcpy(products[1].productName,"可爱女装");
    strcpy(products[1].productType,"STAR002");
    strcpy(products[1].productCompany,"双星服装制造厂");
    products[1].productPrice = 25.5;
    products[1].productCount = 150;
    strcpy(products[1].memo,"好服装,双星造");
    products[1].next = NULL;

    AddProduct(&products[0]);
    AddProduct(&products[1]);

    sellInfo[0].day = 16;
    strcpy(sellInfo[0].memo,"测试数据1");
    sellInfo[0].month = 7;
    sellInfo[0].next = NULL;
    sellInfo[0].productId = 1;
    sellInfo[0].sellCount = 8;
    strcpy(sellInfo[0].userName,"sell");
    sellInfo[0].year = 2008;

    sellInfo[1].day = 17;
    strcpy(sellInfo[1].memo,"测试数据2");
    sellInfo[1].month = 7;
    sellInfo[1].next = NULL;
    sellInfo[1].productId = 2;
    sellInfo[1].sellCount = 5;
    strcpy(sellInfo[1].userName,"sell");
    sellInfo[1].year = 2008;

    AddSellInfo(&sellInfo[0]);
    AddSellInfo(&sellInfo[1]);


};

/**函数功能: 向系统用户信息链表中加入用户信息**/
int AddUser(SystemUser *pUser) {
    SystemUser *pSystemUser,*tempSystemUser;

    tempSystemUser = pSystemUserHead;
    while(NULL != tempSystemUser) {
        if(0 ==strcmp(tempSystemUser->userName,pUser->userName)) {
            printf("对不起,你要添叫的用户已经存在");
            return FUNCTION_FAILED;
        }
        tempSystemUser = tempSystemUser->next;
    }

    pSystemUser = (SystemUser *) malloc(sizeof(SystemUser));     //在堆空间中分配用户信息的内存
    if(NULL == pSystemUser) {
        printf("分配用户信息内存时发生错误");
        return FUNCTION_FAILED;
    }
    
    
    strcpy(pSystemUser->userName,pUser->userName);                            //拷贝用户信息到堆空间中
    strcpy(pSystemUser->password,pUser->password);
    pSystemUser->userType = pUser->userType;
    pSystemUser->next = pUser->next;
    
    tempSystemUser = pSystemUserHead;
    if(NULL == tempSystemUser) {
        pSystemUserHead = pSystemUser;
    } else {
        while(NULL != tempSystemUser->next)                                                //遍历到用户信息的最后一条记录
            tempSystemUser = tempSystemUser->next;
        tempSystemUser->next = pSystemUser;                                                    //将用户信息加入到链表的最后
    }
//    printf("添加用户信息成功!");
    return FUNCTION_SUCCESS;
};

/**函数功能: 向商品信息链表中加入商品信息**/
int AddProduct(Products *pPro) {
    int newProductId = 1;                                                                                    //新加入商品的商品编号从1开始
    Products *tempProduct,*pProduct;
    
    tempProduct = pProductHead;                                                                        //生成编号,最后一件商品编号+1
    while(NULL != tempProduct) {
        newProductId = tempProduct->productId + 1;
        tempProduct = tempProduct->next;
    }

    pProduct = (Products *)malloc(sizeof(Products));
    if(NULL == pProduct) {
        printf("对不器，添加商品信息时,堆内存分配失败!");
        return FUNCTION_FAILED;
    }
    pProduct->productId = newProductId;                                                        //拷贝商品信息
    strcpy(pProduct->productName,pPro->productName);
    strcpy(pProduct->productType,pPro->productType);
    strcpy(pProduct->productCompany,pPro->productCompany);
    pProduct->productPrice = pPro->productPrice;
    pProduct->productCount = pPro->productCount;
    strcpy(pProduct->memo,pPro->memo);
    pProduct->next = pPro->next;

    tempProduct = pProductHead;                                                                        //将商品信息加入到商品信息链表最后
    if(NULL == tempProduct) {
        pProductHead = pProduct;
    } else {
        while(NULL != tempProduct->next)
            tempProduct = tempProduct->next;
        tempProduct->next = pProduct;
    }
    return FUNCTION_SUCCESS;
};

/**函数功能: 向系统销售信息链表中加入销售信息**/
int AddSellInfo(SellInfoRecord *pSellInfo) {
    int newSellInfoId = 1;                                                                                //新加入销售记录的编号从1开始
    SellInfoRecord *tmpSellInfo,*pSellInfoRecord;
    
    tmpSellInfo = pSellInfoHead;                                                                        //生成编号,最后一个销售编号+1
    while(NULL != tmpSellInfo) {
        newSellInfoId = tmpSellInfo->saleId + 1;
        tmpSellInfo = tmpSellInfo->next;
    }

    pSellInfoRecord = (SellInfoRecord *)malloc(sizeof(SellInfoRecord));
    if(NULL == pSellInfoRecord) {
        printf("对不起，添加销售记录信息时,堆内存分配失败!");
        return FUNCTION_FAILED;
    }
    pSellInfoRecord->saleId = newSellInfoId;
    pSellInfoRecord->day = pSellInfo->day;
    strcpy(pSellInfoRecord->memo,pSellInfo->memo);
    pSellInfoRecord->month = pSellInfo->month;
    pSellInfoRecord->next = pSellInfo->next;
    pSellInfoRecord->productId = pSellInfo->productId;
    pSellInfoRecord->sellCount = pSellInfo->sellCount;
    strcpy(pSellInfoRecord->userName,pSellInfo->userName);
    pSellInfoRecord->year = pSellInfo->year;


    tmpSellInfo = pSellInfoHead;                                                                //将销售信息加入到销售记录信息链表最后
    if(NULL == tmpSellInfo) {
        pSellInfoHead = pSellInfoRecord;
    } else {
        while(NULL != tmpSellInfo->next)
            tmpSellInfo = tmpSellInfo->next;
        tmpSellInfo->next = pSellInfoRecord;
    }
    return FUNCTION_SUCCESS;
};

/**函数功能: 向商品信息链表中加入商品信息**/

/*系统登陆函数*/
void SystemLogin() {
    char userName[20],password[20];
    int isLogin = 0;
    SystemUser *tmpUser;
    printf("请输入你的系统用户帐号:");
    scanf("%s",userName);
    printf("\n请输入你的系统用户密码:");
    scanf("%s",password);

    tmpUser = pSystemUserHead;
    while(NULL != tmpUser) {
        if(0 == strcmp(tmpUser->userName,userName)) {
            if(0 == strcmp(tmpUser->password,password)) {
                isLogin = 1;
                strcpy(currentUser,tmpUser->userName);
                currentUserType = tmpUser->userType;
                switch(currentUserType) {
                    case ADMIN_USER_TYPE:
                        AdminOperationMenu();
                        break;
                    case BOSS_USER_TYPE:
                        BossOperationMenu();
                        break;
                    case SELL_USER_TYPE:
                        SellOperationMenu();
                        break;
                    default:
                        break;
                }
            } else {
                printf("对不起,你输入的密码错误!\n");
                SystemLogin();                                                            //用户名正确,密码错误
            }
        }
        tmpUser = tmpUser->next;
    }
    if(isLogin != 1) {
        printf("对不起,该用户不存在\n");                                        //遍历了所有用户都没有找到用户
        SystemLogin();
    }
}

void WelcomeMenu() {
    printf("********************欢迎光临服装销售管理系统********************\n");
    printf("系统功能说明:\n");
    printf("   管理员功能:\n");
    printf("       (1)自身密码修改\n");
    printf("       (2)用户信息管理:添加,修改,删除,查询\n");
    printf("       (3)商品信息管理:添加,修改,查询,删除\n");
    printf("       (4)销售报表显示:日销售报表,月销售报表,销售员销售报表\n");
    printf("       (5)退出登陆系统\n");
    printf("   店长功能:\n");
    printf("       (1)自身密码修改\n");
    printf("       (2)商品信息管理:添加,修改,查询,删除\n");
    printf("       (3)销售报表显示:日销售报表,月销售报表,销售员销售报表\n");
    printf("       (4)退出登陆系统\n");
    printf("   销售员功能:\n");
    printf("       (1)商品浏览,查询,商品销售\n");
    printf("       (2)自己商品销售报表显示:日销售报表,月销售报表\n");
    printf("       (3)退出登陆系统\n");
    printf("*************************欢迎使用本系统**************************\n");
};

void AdminOperationMenu() {
    int select;
    while(1) {
        printf("亲爱的管理员%s同志,欢迎使用本系统,你拥有下面所有功能:\n",currentUser);
        printf("  (1)自身密码修改\n");
        printf("  (2)用户信息管理:添加,修改,查询,删除\n");
        printf("  (3)商品信息管理:添加,修改,查询,删除\n");
        printf("  (4)销售报表显示:日报表,月报表,商品销售量报表,销售员业绩报表\n");
        printf("  (5)退出系统\n");
        printf("请输入上面功能对应的序号进行功能选择:");
        scanf("%d",&select);
        switch(select) {
            case 1:
                ChangePassword();
                continue;
            case 2:
                UserManage();
                continue;
            case 3:
                ProductsManage();
                continue;
            case 4:
                ReportPrint();
                continue;
            case 5:
                ExitSystem();
                break;
            default:
                break;
        }
    }
};

void BossOperationMenu() {
  int select;
    while(1) {
        printf("亲爱的店长%s同志,欢迎使用本系统,你拥有下面所有功能:\n",currentUser);
        printf("  (1)自身密码修改\n");
        printf("  (2)商品信息管理:添加,修改,查询,删除\n");
        printf("  (3)销售报表显示:日报表,月报表,商品销售量报表,销售员业绩报表\n");
        printf("  (4)退出系统\n");
        printf("请输入上面功能对应的序号进行功能选择:");
        scanf("%d",&select);
        switch(select) {
            case 1:
                ChangePassword();
                break;
            case 2:
                ProductsManage();
                break;
            case 3:
                ReportPrint();
                break;
            case 4:
                ExitSystem();;
                break;
            default:
                break;
        }
    }
};

void SellOperationMenu() {
    int select;
    while(1) {
        printf("亲爱的销售员%s同志,欢迎使用本系统,你拥有下面所有功能:\n",currentUser);
        printf("  (1)商品浏览\n");
        printf("  (2)商品查询\n");
        printf("  (3)商品销售\n");
        printf("  (4)报表查看\n");
        printf("  (5)退出登陆系统\n");
        printf("请输入上面功能对应的序号进行功能选择:");
        scanf("%d",&select);
        switch(select) {
            case 1:
                ProductsView();
                continue;
            case 2:
                ProductFind();
                continue;
            case 3:
                ProductsSell();
                continue;
            case 4:
                ReportPrint();
                continue;
            case 5:
                ExitSystem();;
                break;
            default:
                break;
        }
    }
};

void ChangePassword() {
    char newPassword1[20],newPassword2[20];
    SystemUser *tmpUser;
    printf("请输入你的新密码:");
    scanf("%s",newPassword1);
    printf("请再次输入你的新密码:");
    scanf("%s",newPassword2);
    if(0 != strcmp(newPassword1,newPassword2)) {
        printf("对不起,你两次输入的密码不一致,修改失败!\n");
        return ;
    }

    tmpUser = pSystemUserHead;
    while(NULL != tmpUser) {
        if(0 == strcmp(tmpUser->userName,currentUser)) {
            strcpy(tmpUser->password,newPassword1);
            printf("密码修改成功!\n");
            break;
        }
        tmpUser = tmpUser->next;
    }
};

void UserManage() {
    int select;
    while(1) {
        printf("亲爱的管理员%s同志,你目前进入的是用户信息管理功能:\n",currentUser);
        printf("  (1)用户信息查看\n");
        printf("  (2)用户信息添加\n");
        printf("  (3)用户信息修改\n");
        printf("  (4)用户信息删除\n");
        printf("  (5)返回上级菜单\n");
        printf("  (6)退出登陆系统\n");
        printf("请输入上面功能对应的序号进行功能选择:");
        scanf("%d",&select);
        switch(select)
        {
            case 1:
                UserInfoView();
                continue;
            case 2:
                UserInfoAdd();
                continue;
            case 3:
                UserInfoModify();
                continue;
            case 4:
                UserInfoDelete();
                continue;
            case 5:
                AdminOperationMenu();
                break;
            case 6:
                ExitSystem();
                break;
            default:
                break;
        }
    }
};

void ProductsView() {
    Products *tmpProduct;
    int i;
    i = 1;
    tmpProduct = pProductHead;
    if(NULL == tmpProduct)
        printf("对不起,目前还没有商品信息");
    else{
        while(NULL != tmpProduct) {
            printf("第%d件商品信息如下:\n",i);
            printf("商品编号: %d\n",tmpProduct->productId);
            printf("商品名称: %s\n",tmpProduct->productName);
            printf("商品型号: %s\n",tmpProduct->productType);
            printf("商品厂家: %s\n",tmpProduct->productCompany);
            printf("商品价格: %f\n",tmpProduct->productPrice);
            printf("商品数量: %d\n",tmpProduct->productCount);
            printf("商品附加信息: %s\n",tmpProduct->memo);
            
            tmpProduct = tmpProduct->next;
            i++;
        }
    }
};

void ProductsSell() {
    SellInfoRecord sellInfo;
    printf("亲爱的销售员朋友%s,你好,你现在进入的是产品的销售功能:",currentUser);
    printf("请依次输入以下销售信息:\n");
    printf("销售的产品编号:");
    scanf("%d",&sellInfo.productId);
    printf("销售的产品数量:");
    scanf("%d",&sellInfo.sellCount);
    if(sellInfo.sellCount > getCountById(sellInfo.productId)) {
        printf("对不起,你输入的销售数量大于库存,销售失败!\n");
        return ;
    }
    strcpy(sellInfo.userName,currentUser);
    printf("销售商品所在年份:");
    scanf("%d",&sellInfo.year);
    printf("销售商所在月份:");
    scanf("%d",&sellInfo.month);
    printf("销售商品所在号数:");
    scanf("%d",&sellInfo.day);
    printf("销售商品的附加信息:");
    scanf("%s",sellInfo.memo);

    sellInfo.next = NULL;


    if(FUNCTION_SUCCESS == AddSellInfo(&sellInfo)) {
        printf("商品销售成功!\n");
        ReduceProductCount(sellInfo.productId,sellInfo.sellCount);
    };
};


void ExitSystem() {
    memset(currentUser,0x00,sizeof(char)*20);
    currentUserType = 0;
    SystemLogin();
};

void ProductsManage() {
    int select;
    while(1) {
        printf("亲爱的%s朋友,你好,你现在进入的是商品管理功能,你可以选择以下功能:\n",currentUser);
        printf("   (1)商品信息查看\n");
        printf("   (2)商品信息查找\n");
        printf("   (3)商品信息添加\n");
        printf("   (4)商品信息修改\n");
        printf("   (5)商品信息删除\n");
        printf("   (6)返回上一级菜单\n");
        printf("   (7)退出登陆系统\n");
        printf("请选择应的操作编号:");
        scanf("%d",&select);
        switch(select) {
            case 1:
                ProductsView();
                continue;
            case 2:
                ProductFind();
                continue;
            case 3:
                InputAndAddProduct();
                continue;
            case 4:
                ModifyProduct();
                continue;
            case 5:
                DeleteProduct();
                continue;
            case 6:
                switch(currentUserType) {
                    case ADMIN_USER_TYPE:
                        AdminOperationMenu();
                        break;
                    case BOSS_USER_TYPE:
                        BossOperationMenu();
                        break;
                    case SELL_USER_TYPE:
                        SellOperationMenu();
                        break;
                    default:
                        break;
                }
                break;
            case 7:
                ExitSystem();
                break;
            default:
                break;
        }
    }
};

void InputAndAddProduct() {
    Products product;
    printf("亲爱的%s朋友,你好,请依次输入新商品的信息:\n",currentUser);
    printf("商品名称:");
    scanf("%s",product.productName);
    printf("商品型号:");
    scanf("%s",product.productType);
    printf("商品制造商:");
    scanf("%s",product.productCompany);
    printf("商品价格:");
    scanf("%f",&product.productPrice);
    printf("商品数量:");
    scanf("%d",&product.productCount);
    printf("商品附加信息:");
    scanf("%s",product.memo);
    product.next = NULL;

    if(FUNCTION_SUCCESS == AddProduct(&product))
        printf("商品信息添加成功!\n");
};

void ModifyProduct() {
    int productId;                                //待修改的商品编号
    Products *tmpProduct;        
    printf("亲爱的%s朋友,你好,你现在进入的商品信息修改功能:\n",currentUser);
    printf("请输入要修改的商品编号:");
    scanf("%d",&productId);
    tmpProduct = pProductHead;
    if(NULL == tmpProduct) return ;
    while(NULL != tmpProduct) {
        if(productId == tmpProduct->productId){
            printf("商品编号%d的商品信息如下:\n",productId);
            printf("  商品名称: %s\n",tmpProduct->productName);
            printf("  商品型号: %s\n",tmpProduct->productType);
            printf("  商品厂家: %s\n",tmpProduct->productCompany);
            printf("  商品价格: %f\n",tmpProduct->productPrice);
            printf("  商品数量: %d\n",tmpProduct->productCount);
            printf("  商品附加信息: %s\n",tmpProduct->memo);

            printf("下面请对照修改该商品的相应信息:\n");
            printf("新的商品名称: ");
            scanf("%s",tmpProduct->productName);
            printf("新的商品型号: ");
            scanf("%s",tmpProduct->productType);
            printf("新的商品厂家: ");
            scanf("%s",tmpProduct->productCompany);
            printf("新的商品价格: ");
            scanf("%f",&tmpProduct->productPrice);
            printf("新的商品数量: ");
            scanf("%d",&tmpProduct->productCount);
            printf("新的商品附加信息: ");
            scanf("%s",tmpProduct->memo);

            printf("商品信息修改成功!\n");

            break;
        }
        tmpProduct = tmpProduct->next;
    }

    

};

void ProductFind() {
    Products *tmpProduct;    
    int findWay,productId;
    char productName[20];
    printf("亲爱的%s朋友,你好,你现在进入的商品查询功能:\n",currentUser);
    printf("请选择查询方式: 1--按商品编号查询  2--按商品名称查询\n");
    scanf("%d",&findWay);
    tmpProduct = pProductHead;
    switch(findWay) {
        case 1:
            printf("请输入查询的商品编号:");
            scanf("%d",&productId);
            while(NULL != tmpProduct) {
                if(productId == tmpProduct->productId) {
                    printf("你查询的商品编号为%d的商品信息如下:\n",productId);
                    printf("  商品名称: %s\n",tmpProduct->productName);
                    printf("  商品型号: %s\n",tmpProduct->productType);
                    printf("  商品厂家: %s\n",tmpProduct->productCompany);
                    printf("  商品价格: %f\n",tmpProduct->productPrice);
                    printf("  商品数量: %d\n",tmpProduct->productCount);
                    printf("  商品附加信息: %s\n",tmpProduct->memo);
                    return ;
                }
                tmpProduct = tmpProduct->next;
            }
            printf("对不起,不存在该商品编号的商品!\n");
            break;
        case 2:
            printf("请输入查询的商品名称:");
            scanf("%s",productName);
            while(NULL != tmpProduct) {
                if(0 == strcmp(tmpProduct->productName,productName)) {
                    printf("你要查询的商品名称为%s的商品信息如下:\n",productName);
                    printf("  商品名称: %s\n",tmpProduct->productName);
                    printf("  商品型号: %s\n",tmpProduct->productType);
                    printf("  商品厂家: %s\n",tmpProduct->productCompany);
                    printf("  商品价格: %f\n",tmpProduct->productPrice);
                    printf("  商品数量: %d\n",tmpProduct->productCount);
                    printf("  商品附加信息: %s\n",tmpProduct->memo);
                    return ;
                }
                tmpProduct = tmpProduct->next;
            }
            printf("对不起,不存在该商品编号的商品!\n");
            break;
        default:
            break;
    }
}
void DeleteProduct() {
    int productId = 0;
    Products *tmpProductA,*tmpProductB;
    printf("亲爱的%s朋友,你好,你现在进入的商品删除功能:\n",currentUser);
    printf("请输入你要删除的商品编号:\n");
    scanf("%d",&productId);
    tmpProductA = tmpProductB = pProductHead;    //tmpProductB指向要删除的记录，tmpProductA指向前一条记录
    if(NULL == tmpProductB) return ;
    while(NULL != tmpProductB){
        if(tmpProductB->productId == productId) {
            if(tmpProductB == pProductHead && tmpProductB->next == NULL){    //如果系统只有一条商品信息
                free(pProductHead);
                pProductHead = NULL;
                printf("商品信息删除成功!\n");
                return ;
            }
            tmpProductA->next = tmpProductB->next;
            if(pProductHead == tmpProductB)
                pProductHead = tmpProductB->next;
            free(tmpProductB);
            printf("商品信息删除成功！\n");
            return ;
        }
        else {
            tmpProductA = tmpProductB;
            tmpProductB = tmpProductB->next;
        }
    }
    printf("对不起，不存在该商品编号的信息!");
};

void ReportPrint() {
    int select = 0;
    if(SELL_USER_TYPE != currentUserType) {
        while(1) {
            printf("亲爱的朋友%s,你好，你现在进入的是销售报表功能界面:\n",currentUser);
            printf("  (1)所有商品销售情况\n");
            printf("  (2)商品日销售报表\n");
            printf("  (3)商品月销售报表\n");
            printf("  (4)销售员销售报表\n");
            printf("  (5)返回上级菜单\n");
            printf("  (6)退出登陆系统\n");
            printf("请选择对应的功能号:");
            scanf("%d",&select);
            switch(select) {
                case 1:
                    ShowAllSellReport();
                    continue;
                case 2:
                    ShowDaySellReport();
                    continue;
                case 3:
                    ShowMonthSellReport();
                    continue;
                case 4:
                    ShowEmployeeSellReport();
                    continue;
                case 5:
                    switch(currentUserType) {
                        case ADMIN_USER_TYPE:
                            AdminOperationMenu();
                            break;
                        case BOSS_USER_TYPE:
                            BossOperationMenu();
                            break;
                        default:
                            break;
                    }
                    break;
                case 6:
                    ExitSystem();
                    break;
                default:
                    break;
            }
        }
    } else {
        while(1) {
            printf("亲爱的销售员%s,你好，你现在进入的是销售报表功能界面:\n",currentUser);
            printf("  (1)查看自己日销售报表\n");
            printf("  (2)查看自己月销售报表\n");
            printf("  (3)返回上级菜单\n");
            printf("  (4)退出登陆系统");
            printf("请选择相应的功能号:");
            scanf("%d",&select);
            switch(select) {
                case 1:
                    ShowDaySellReport();
                    continue;
                case 2:
                    ShowMonthSellReport();
                    continue;
                case 3:
                    SellOperationMenu();
                    break;
                case 4:
                    ExitSystem();
                    break;
                default:
                    break;
            }
        }
    }
};


void UserInfoView() {
    SystemUser *tmpUser;
    tmpUser = pSystemUserHead;
    printf("亲爱的管理员%s,你好，你查看的所有用户信息如下:\n",currentUser);
    printf("用户名\t密码\t用户类型(1代表管理员,2代表店长，3代表销售员)\n");
    while(NULL != tmpUser){
        printf("%s\t%s\t%d\n",tmpUser->userName,tmpUser->password,tmpUser->userType);
        tmpUser = tmpUser->next;
    }
};

void UserInfoAdd() {
    SystemUser tmpUser;
    printf("亲爱的管理员%s,请依次输入用户信息:\n",currentUser);
    printf("用户名:");
    scanf("%s",tmpUser.userName);
    printf("用户密码:");
    scanf("%s",tmpUser.password);
    printf("用户类型(1代表管理员,2代表店长,3代表销售员):");
    scanf("%d",&tmpUser.userType);
    tmpUser.next = NULL;

    if(FUNCTION_SUCCESS == AddUser(&tmpUser))
        printf("用户信息添加成功!\n");

};

void UserInfoModify() {
    char userName[20];
    SystemUser *pUser;
    printf("亲爱的管理员%s,请输入要修改的用户帐号:\n",currentUser);
    scanf("%s",userName);
    pUser = pSystemUserHead;
    while(NULL != pUser) {
        if(0 == strcmp(pUser->userName,userName)) {
            printf("请输入新的帐号:");
            scanf("%s",pUser->userName);
            printf("请输入新的密码:");
            scanf("%s",pUser->password);
            printf("请输入新的用户类型(1代表管理员,2代表店长,3代表销售员):");
            scanf("%d",&pUser->userType);
            printf("用户信息修改成功\n");
            return ;
        }
        pUser = pUser->next;
    }
    printf("对不起,没有你查找的用户信息!\n");
};

void UserInfoDelete() {

    SystemUser *pUserA,*pUserB;
    char userName[20];
    printf("亲爱的管理员%s朋友,你好,你现在进入的用户信息删除功能:\n",currentUser);
    printf("请输入你要删除的用户名:\n");
    scanf("%s",userName);
    pUserA = pUserB = pSystemUserHead;    //pUserB指向要删除的记录,pUserA指向前一条记录
    if(NULL == pUserB) return ;
    while(NULL != pUserB){
        if(0 == strcmp(userName,pUserB->userName)) {
            if(pUserB == pSystemUserHead && pUserB->next == NULL){    //如果系统只有一条商品信息
                free(pSystemUserHead);
                pSystemUserHead = NULL;
                printf("用户信息删除成功!\n");
                return ;
            }
            pUserA->next = pUserB->next;
            if(pSystemUserHead == pUserB)
                pSystemUserHead = pUserB->next;
            free(pUserB);
            printf("用户信息删除成功！\n");
            return ;
        }
        else {
            pUserA = pUserB;
            pUserB = pUserB->next;
        }
    }
    printf("对不起，不存在该帐号的用户信息!");
};

void ShowDaySellReport() {
    int year,month,day;
    int rsCount = 0;
    float totalPrice = 0.0,onePrice;
    char productName[20];
    SellInfoRecord *tmpSellInfo;
    printf("你好%s:当前功能将进行日销售报表显示\n",currentUser);
    printf("请输入销售时间年份:");
    scanf("%d",&year);
    printf("请输入销售时间月份:");
    scanf("%d",&month);
    printf("请输入销售时间号数:");
    scanf("%d",&day);

    tmpSellInfo = pSellInfoHead;
    if(NULL == tmpSellInfo) return ;
    while(NULL != tmpSellInfo) {
        if(year == tmpSellInfo->year &&
           month == tmpSellInfo->month &&
             day == tmpSellInfo->day &&
             ((SELL_USER_TYPE == currentUserType)?(0 == strcmp(tmpSellInfo->userName,currentUser)):1)) {
            rsCount++;
            printf("符合条件的第%d条商品销售记录信息如下:\n",rsCount);
            printf(" 销售编号:%d\n",tmpSellInfo->saleId);
            printf(" 产品编号:%d\n",tmpSellInfo->productId);
            getProductNameById(tmpSellInfo->productId,productName);
            printf(" 产品名称:%s\n",productName);
            onePrice = getPriceById(tmpSellInfo->productId);
            printf(" 商品单价:%f\n",onePrice);
            printf(" 销售数量:%d\n",tmpSellInfo->sellCount);
            printf(" 销售员:%s\n",tmpSellInfo->userName);
            printf(" 销售时间:%d年%d月%d日\n",tmpSellInfo->year,tmpSellInfo->month,tmpSellInfo->day);
            totalPrice += onePrice*tmpSellInfo->sellCount;
        }
        tmpSellInfo = tmpSellInfo->next;
    }
    printf("总共有%d条符合条件的记录,销售总价%f元\n",rsCount,totalPrice);
};

void ShowMonthSellReport() {
    int year,month;
    int rsCount = 0;
    float totalPrice = 0.0,onePrice;
    char productName[20];
    SellInfoRecord *tmpSellInfo;
    printf("你好%s:当前功能将进行月销售报表显示\n",currentUser);
    printf("请输入销售时间年份:");
    scanf("%d",&year);
    printf("请输入销售时间月份:");
    scanf("%d",&month);

    tmpSellInfo = pSellInfoHead;
    if(NULL == tmpSellInfo) return ;
    while(NULL != tmpSellInfo) {
        if(year == tmpSellInfo->year &&
           month == tmpSellInfo->month &&
             ((SELL_USER_TYPE == currentUserType)?(0 == strcmp(tmpSellInfo->userName,currentUser)):1)) {
            rsCount++;
            printf("符合条件的第%d条商品销售记录信息如下:\n",rsCount);
            printf(" 销售编号:%d\n",tmpSellInfo->saleId);
            printf(" 产品编号:%d\n",tmpSellInfo->productId);
            getProductNameById(tmpSellInfo->productId,productName);
            printf(" 产品名称:%s\n",productName);
            onePrice = getPriceById(tmpSellInfo->productId);
            printf(" 商品单价:%f\n",onePrice);
            printf(" 销售数量:%d\n",tmpSellInfo->sellCount);
            printf(" 销售员:%s\n",tmpSellInfo->userName);
            printf(" 销售时间:%d年%d月%d日\n",tmpSellInfo->year,tmpSellInfo->month,tmpSellInfo->day);
            totalPrice += onePrice*tmpSellInfo->sellCount;
        }
        tmpSellInfo = tmpSellInfo->next;
    }
    printf("总共有%d条符合条件的记录,销售总价%f元\n",rsCount,totalPrice);
};

void ShowEmployeeSellReport() {
    char userName[20];
    int rsCount = 0;
    float totalPrice = 0.0,onePrice;
    char productName[20];
    SellInfoRecord *tmpSellInfo;
    printf("你好%s:当前功能将进行销售员销售报表显示\n",currentUser);
    printf("请输入销售员的帐户名:");
    scanf("%s",userName);
    tmpSellInfo = pSellInfoHead;
    if(NULL == tmpSellInfo) return ;
    while(NULL != tmpSellInfo) {
        if(0 == strcmp(userName,tmpSellInfo->userName)) {
            rsCount++;
            printf("符合条件的第%d条商品销售记录信息如下:\n",rsCount);
            printf(" 销售编号:%d\n",tmpSellInfo->saleId);
            printf(" 产品编号:%d\n",tmpSellInfo->productId);
            getProductNameById(tmpSellInfo->productId,productName);
            printf(" 产品名称:%s\n",productName);
            onePrice = getPriceById(tmpSellInfo->productId);
            printf(" 商品单价:%f\n",onePrice);
            printf(" 销售数量:%d\n",tmpSellInfo->sellCount);
            printf(" 销售员:%s\n",tmpSellInfo->userName);    
            printf(" 销售时间:%d年%d月%d日\n",tmpSellInfo->year,tmpSellInfo->month,tmpSellInfo->day);
            totalPrice += onePrice*tmpSellInfo->sellCount;
        }
        tmpSellInfo = tmpSellInfo->next;
    }
    printf("总共有%d条符合条件的记录,销售总价%f元\n",rsCount,totalPrice);
};

void ShowAllSellReport() {
    int rsCount = 0;
    float totalPrice = 0.0,onePrice;
    char productName[20];
    SellInfoRecord *tmpSellInfo;
    printf("你好%s:当前功能将进行所有销售报表显示\n",currentUser);
    tmpSellInfo = pSellInfoHead;
    if(NULL == tmpSellInfo) return ;
    while(NULL != tmpSellInfo) {
        rsCount++;
        printf("第%d条商品销售记录信息如下:\n",rsCount);
        printf(" 销售编号:%d\n",tmpSellInfo->saleId);
        printf(" 产品编号:%d\n",tmpSellInfo->productId);
        getProductNameById(tmpSellInfo->productId,productName);
        printf(" 产品名称:%s\n",productName);
        onePrice = getPriceById(tmpSellInfo->productId);
        printf(" 商品单价:%f\n",onePrice);
        printf(" 销售数量:%d\n",tmpSellInfo->sellCount);
        printf(" 销售员:%s\n",tmpSellInfo->userName);    
        printf(" 销售时间:%d年%d月%d日\n",tmpSellInfo->year,tmpSellInfo->month,tmpSellInfo->day);
        totalPrice += onePrice*tmpSellInfo->sellCount;

        tmpSellInfo = tmpSellInfo->next;
    }
    printf("总共有%d条符合条件的记录,销售总价%f元\n",rsCount,totalPrice);
};

int getCountById(int productId) {
    Products *tmpProduct;
    tmpProduct = pProductHead;
    while(NULL != tmpProduct) {
        if(productId == tmpProduct->productId)
            return tmpProduct->productCount;
        tmpProduct = tmpProduct->next;
    }
    return FUNCTION_FAILED;
};

float getPriceById(int productId) {
    Products *tmpProduct;
    tmpProduct = pProductHead;
    while(NULL != tmpProduct) {
        if(productId == tmpProduct->productId)
            return tmpProduct->productPrice;
        tmpProduct = tmpProduct->next;
    }
    return 0.0;
};

void ReduceProductCount(int productId,int Count) {
    Products *tmpProduct;
    tmpProduct = pProductHead;
    while(NULL != tmpProduct) {
        if(productId == tmpProduct->productId) {
            tmpProduct->productCount = tmpProduct->productCount - Count;
        }
        tmpProduct = tmpProduct->next;
    }
};
int getProductNameById(int productId,char *p) {
    Products *tmpProduct;
    tmpProduct = pProductHead;
    while(NULL != tmpProduct) {
        if(productId == tmpProduct->productId) {
            strcpy(p,tmpProduct->productName);
            return FUNCTION_SUCCESS;
        }
        tmpProduct = tmpProduct->next;
    }
    return FUNCTION_FAILED;
}

void main()
{
    InitSystem();
    WelcomeMenu();    
    SystemLogin();
}