c语言实现的货物管理系统实例代码（增加删除 查找货物信息等功能

/*主管权限数据格式化*/
#define HEADER1_zg "-----------------------------货物管理系统(主管)--------------------------------n"
#define HEADER2_zg "| 编号 |  名称  | 进价 | 售价 | 产地 | 生产日期 |保质期| 库存 | 销量 |  收入  |n"
#define HEADER3_zg "|------|--------|------|------|------|----------|------|------|------|--------|n"
#define FORMAT_zg  "|%-6s|%-8s|%.2f |%.2f |%6s|%-4d%3d%3d| %4d | %4d | %4d |%.2f |n"
#define DATA_zg p->data.numbs,p->data.name,p->data.purchase,p->data.sales,p->data.place,p->data.Date.year,p->data.Date.mouth,p->data.Date.day,p->data.days,p->data.stock,p->data.salesnumb,p->data.income
#define END_zg     "-------------------------------------------------------------------------------n"

/*普通权限数据格式化*/
#define HEADER1_pt "----------------货物管理系统（普通）--------------------n"
#define HEADER2_pt "| 编号 |  名称  | 售价 | 产地 | 生产日期 |保质期| 销量 |n"
#define HEADER3_pt "|------|--------|------|------|----------|------|------|n"
#define FORMAT_pt  "|%-6s|%-8s| %.2f|%6s|%-4d%3d%3d| %4d | %4d |n"
#define DATA_pt p->data.numbs,p->data.salesnumb
#define END_pt    "--------------------------------------------------------n"

int yhflag=0;        /*是否优惠*/
int incomflag=0;   /*是否计算收入*/
int dateflag=0;   /*是否输入日期*/
int saveflag=0;   /*是否需要保存*/
char zg[]="zg";
char pt[]="pt";

struct date
{
    int year;
    int mouth;
    int day;
};

/*货物基本信息*/
struct goods
{
    char numbs[6];    /*编号*/
    char name[10];        /*名称*/
    float purchase;        /*进价*/
    float sales;    /*售价*/
    char place[10];    /*产地*/
    struct date Date;    /*生产日期*/
    int days;  /*保质期*/
    int datecha; /*保质期截止日期差*/
    int stock;    /*库存量*/
    int  salesnumb;    /*销量*/
    float income;    /*收入*/
};
typedef struct node
{
    struct goods data;
    struct node *next;
}Node,*Link;

/*格式化输出主管表头*/
void printheader_zg()
{
    printf(HEADER1_zg);
    printf(HEADER2_zg);
    printf(HEADER3_zg);
}
/*格式化输出普通表头*/
void printheader_pt()
{
    printf(HEADER1_pt);
    printf(HEADER2_pt);
    printf(HEADER3_pt);
}
/*格式化输出主管表中数据*/
void printdata_zg(Node *pp)
{
    Node *p;
    p=pp;
    printf(FORMAT_zg,DATA_zg);
}
/*格式化输出普通表中数据*/
void printdata_pt(Node *pp)
{
    Node *p;
    p=pp;
    printf(FORMAT_pt,DATA_pt);
}
/*输出案件错误信息*/
void wrong()
{
    printf("nnnn*******错误：输入错误，按任意键继续*******n");
    getchar();
}
/*输出为查找到货物的信息*/
void Nofind()
{
    printf("n*****无此货物信息！*****n");
    getchar();
}
/*主管显示菜单*/
void Disp(Link L,char s[])
{
    Node *p;
    p=L->next;
    if (!p) /*空，则*/
    {
        printf("n没有录入货物信息n");
        getchar();
        return ;
    }   
    printf("nn");
    if (strcmp(zg,s)==0)
    {
        printheader_zg();
        while (p)
        {
            printdata_zg(p);
            p=p->next;
            printf(HEADER3_zg);
        }
    }
    else
    {
        printheader_pt();
        while (p)
        {
            printdata_pt(p);
            p=p->next;
            printf(HEADER3_pt);
        }
    }

    getchar();
}
/*返回链表中符合要求的节点的指针，s[]保存用户查找内容，NaorNum[]保存按什么查找”name,num“*/
Node *Locate(Link L,char s[],char NaorNum[] )
{
    Node *p;
    if (strcmp(NaorNum,"num")==0)
    {
        p=L->next;
        while (p)
        {
            if (strcmp(p->data.numbs,s)==0)
                return p;
            p=p->next;
        }
    }
    else if (strcmp(NaorNum,"name")==0)
    {
        p=L->next;
        while (p)
        {
            if (strcmp(p->data.name,s)==0)
                return p;
            p=p->next;
        }
    }
    return 0;     /*未找到，返回空指针*/
}
/*平润年判断*/
int Year_pd(int year)
{
    int flag;
    if ((year%4==0&&year%100!=0)||year%400==0)
    {/*闰年*/
        flag=0;
    }
    else
    {/*平年*/
        flag=1;
    }
    return flag;
}
/*月份对应的天数*/
int Day_pd(int mouth,int flag)
{
    int day;
    switch(mouth)
    {
    case 1:
    case 3:
    case 5:
    case 7:
    case 8:
    case 10:
    case 12:day=31;break;
    case 4:
    case 6:
    case 9:
    case 11:day=30;break;
    case 2:if (flag) day=28;
           else day=29;break;
    }
    return day;
}
/*输入字符串，并进行验证,用户的输入通过*t输出*/
void S_input(char *t,int lens,char *notice)
{
    char str[255];
    do
    {
        printf(notice);
        scanf("%s",str);
        if(strlen(str)>lens)
            printf("n超过了要求长度，重新输入n");
    } while (strlen(str)>lens);
    strcpy(t,str);
}

int Num_input(char *notice)
{
    int a;
    do
    {
        printf(notice);
        scanf("%d",&a);
        if(a<0) printf("n数字必须大于零n");
    } while (a<0);
    return a;
}
/*输入月份进行验证*/
int Mou_input(char *notice)
{
    int mouth=0;
    do
    {
        printf(notice);
        scanf("%d",&mouth);
        if (mouth>12||mouth<0)
            printf("n月份必须在(1~12)之间！n");
    } while (mouth>12||mouth<0);
    return mouth;
}
/*输入天数进行验证*/
int Day_input(char *notice,int year,int mouth)
{
    int day=0;
    int nlimit,flag;
    flag=Year_pd(year);
    do
    {
        printf(notice);
        scanf("%d",&day);
        nlimit=Day_pd(mouth,flag);
        if (day>nlimit||day<0)
            printf("n日期必须在(1~%d)之间！n",nlimit);
    } while (day>nlimit||mouth<0);
    return day;
}
/*增加货物记录*/
void Add_goods(Link L)
{
    Node *p,*r,*s;
    char ch,flag=0,num[10];
    r=L;
    s=L->next;
    system("cls");
    Disp(L,zg);
    while (1)
    {
        while (1) /*输入编号，保证没有被使用，若输入为0，则推出*/
        {
            S_input(num,6,"输入货物编号（按‘0'返回菜单界面）：");
            flag=0;
            if (strcmp(num,"0")==0) return;
            s=L->next;
            while (s) /*查询货物编号是否存在，若存在，要去输入新编号*/
            {
                if (strcmp(s->data.numbs,num)==0)
                {
                    flag=1;
                    break;
                }
                s=s->next;
            }
            if (flag)
            {
                getchar();
                printf("货物编号：%s已存在，是否要重新输入？（y/n）",num);
                scanf("%c",&ch);
                if(ch=='y'||ch=='Y')
                    continue;
                else
                    return;
            }
            else
                break;
        }
        p=(Node *)malloc(sizeof(Node));
        if (!p)
        {
            printf("n没有申请到");
            return; /*返回到主界面*/
        }
        strcpy(p->data.numbs,num);
        S_input(p->data.name,8,"名称：");
        p->data.purchase=Num_input("进价：");
        p->data.sales=Num_input("售价：");
        S_input(p->data.place,"产地：");
        p->data.Date.year=Num_input("成产日期：年：");
        p->data.Date.mouth=Mou_input("         月：");
        p->data.Date.day=Day_input("         日：",p->data.Date.mouth);
        p->data.days=Num_input("保质期（天）：");
        p->data.stock=Num_input("库存：");
        p->data.salesnumb=Num_input("销量：");
        p->data.income=00;
        p->next=r->next;
        r->next=p; /*前插*/
    }
    return ;
}
int select(int a,int b)               /*菜单选择*/
{
    int n;
    do
    {
        printf("nn");
        printf("%15s"," ");
        printf("请输入一个数（%d~%d): [ ]bb",a,b);
        scanf("%d",&n);
    } while (n<a||n>b);
    return n;
}
/*实时计算实际收益*/
void Sum_Income(Link L)
{
    Node *p;
    p=L->next;
    while (p)
    {
        p->data.income=p->data.salesnumb*(p->data.sales-p->data.purchase);
        p=p->next;
    }
    incomflag=1;
    return ;
}
/*查询的通用方法*/
void Sea_by_ways(Link L,Node *p,char s[])
{
    if (p)
    {
        if (strcmp(zg,s)==0)
        {
            printheader_zg();
            printdata_zg(p);
            printf(END_zg);
            printf("按任意键返回...");
            getchar();
        }
        else
        {
            printheader_pt();
            printdata_pt(p);
            printf(END_pt);
            printf("按任意键返回...");
            getchar();
        }
    }
    else
    {
        Nofind();
        getchar();
    }   
}
/*按编号或货物名称查询*/
void Sea_by_name(Link L,char s[])
{
    Node *p;
    char ss[20];
    system("cls");
    S_input(ss,10,"请输入要查找的货物名称：");
    p=Locate(L,ss,"name");
    Sea_by_ways(L,p,s);
}
void Sea_by_num(Link L,"请输入要查找的货物编号：");
    p=Locate(L,"num");
    Sea_by_ways(L,s);
}
/*日期相对于本年的天数*/
int Sum_day(int year,int mouth,int day)
{
    int i,flag,days,sum=0;
    flag=Year_pd(year);
    for (i=1;i<mouth;i++)
    {
        days=Day_pd(i,flag);
        sum+=days;
    }
    return sum+day;
}
/*两个日期差值*/
void Datecha(Link L)
{
    int year,mouth,day;
    Node *p;
    p=L->next;
    year=Num_input("今天日期：年:");
    mouth=Mou_input("月:");
    day=Day_input("日：",year,mouth);
    dateflag=1;
    if (!p)
    {
        printf("***无货物信息，不用输入日期***n");
        getchar();
        return ;
    }
    else
    {
        while (p)
        {
            p->data.datecha=Sum_day(year,day)-Sum_day(p->data.Date.year,p->data.Date.day);
            p=p->next;
        }
    }
}

void Dz_by_data( Link L)
{
    Node *p,*r;
    Link l;
    int year,day,count=0;
    p=L->next;
    l=(Node *)malloc(sizeof(Node));
    l->next=NULL;
    system("cls");
    if (!dateflag)
    {
        Datecha(L);
    }
    printf("| 编号 |  名称  |过期差值|n");
    while (p)
    {
        printf("|%-6s|%-8s|  %4d  |",p->data.numbs,p->data.datecha);
        if (p->data.days>=p->data.datecha)
        {
            /*优惠的标示优惠*/
            if (p->data.days-p->data.datecha<=10)
            {
                count++;
                p->data.sales=p->data.sales/2;
                printf("已优惠n");
                /*        Ltol(l,p->next);*/
            }
            else
            {
                printf("n");
            }
        }
        else
        {
            printf("该商品过期,请删除n");
        }
        p=p->next;
    }

    if(!count)
    {
        printf("/n***没有差10天过期的货物***/n");
        getchar();
        return;
    }
    else
    {
        printf("共有%d中商品打折",count);
        yhflag=1;
        saveflag=1;
        Disp(L,zg);
    }
}
/*删除*/
void Del_by_ways(Link L,Node *p)
{
    Node *q;
    char ch;
    if (p)
    {
        q=L;
        while(q->next!=p)
            q=q->next;
        printheader_zg();
        printdata_zg(p);
        printf(END_zg);
        getchar();
        printf("请确定是否要删除该货物信息(y/n):");
        scanf("%c",&ch);
        if (ch=='y'||ch=='Y')
        {
            q->next=p->next;
            free(p);
            printf("n成功删除该货物信息n");
            saveflag=1;
            getchar();
            return;
        }
        else
        {
            printf("n没有删除该货物信息n");
            getchar();
            return;
        }
    }
    else
    {
        Nofind();
        getchar();
    }   
}
/*通过名称删除*/
void Del_by_name(Link L)
{
    Node *p;
    char s[20];
    system("cls");
    S_input(s,"请输入要查删除的货物名称：");
    p=Locate(L,s,"name");
    Del_by_ways(L,p);
}
/*通过编号删除*/
void Del_by_num(Link L)
{
    Node *p;
    char s[20];
    system("cls");
    S_input(s,"请输入要查删除的货物的编号：");
    p=Locate(L,"num");
    Del_by_ways(L,p);
}

/*补货信息*/
void Buhuo(Link L)
{
    Node *p,*q;
    int i=0;
    p=L->next;
    system("cls");
    if (p)
    {
        q=L->next;
        printf("|  编号  |  名称  |库存|销量|剩余| n");
        while (q)
        {
            /*统计库存，销量，剩余*/
            printf("|%-8s|%-8s|%-4d|%4d|%4d|n",q->data.numbs,q->data.name,q->data.stock,q->data.salesnumb,q->data.stock-q->data.salesnumb);
            q=q->next;
        }
        while (p)
        {
            if ((p->data.stock-p->data.salesnumb)<100)
            {
                if (i==0)
                {
                    printf("需要补货的货物分别是n");
                    printf("|  编号  |商品名称|n");
                }
                printf("|%-8s|%8s|n",p->data.name);
                i++;
            }
            p=p->next;
        }
        if (i)
        {
            printf("共%d种货物n",i);
            getchar();
            return;
        }
        else
        {
            printf("没有需要补充的货物种类n");
            getchar();
            return;
        }
    }
    else
    {
        printf("n***没有货物信息***n");
        printf("n按任意键返回...n");
        getchar();
        return ;
    }
}

void Sort_by_ways(Link L,int n)
{
    int flag=0,a;
    Node *p,*q,*lq,*fq;   /*fq记下节点前驱，lq记下节点的后驱，q每次冒泡遍历，p控制遍历,qq用来交换地址*/
    p=L->next;
    system("cls");
    while (p)
    {
        fq=L;
        q=fq->next;
        while (lq=q->next)
        {
            if (strcmp(zg,s)==0)
            {
                switch (n)
                {
                case 1:a=strcmp(q->data.name,lq->data.name);break;
                case 2:a=strcmp(q->data.numbs,lq->data.numbs);break;
                case 3:a=(q->data.salesnumb>lq->data.salesnumb);break;
                case 4:if(!incomflag) Sum_Income(L); a=(q->data.income>lq->data.income);break;
                case 5:if (!dateflag) Datecha(L);a=(q->data.datecha>lq->data.datecha);break;
                }
            }
            else
            {
                switch (n)
                {
                case 1:a=strcmp(q->data.name,lq->data.numbs);break;
                case 3:a=(q->data.sales>lq->data.sales);break;
                case 4:a=(q->data.salesnumb>lq->data.salesnumb);break;
                case 5:if (!dateflag) Datecha(L);a=(q->data.datecha>lq->data.datecha);break;
                }
            }

            /*if ((n==1)?(strcmp(q->data.name,lq->data.name)):(strcmp(q->data.numbs,q->data.numbs)))*/
            if(a>0)
            {
                flag=1;
                q->next=lq->next;
                lq->next=q;
                fq->next=lq;
            }
            fq=fq->next;
            q=fq->next;
        }
        if(flag==0) break;
        p=p->next;
    }
    if (strcmp(zg,s)==0)
        Disp(L,zg);
    else
        Disp(L,pt);
}

void Wb_Save(Link L)
{
    FILE *out;
    Node *p;
    int count=0;
    if ((out=fopen("d:Goods.txt","w"))==NULL)
    {
        printf("打开文件失败！n");
        getchar();
        return;
    }
    p=L->next;
    fprintf(out,HEADER1_zg);
    fprintf(out,HEADER2_zg);
    fprintf(out,HEADER3_zg);
    while (p)
    {
        fprintf(out,FORMAT_zg,DATA_zg);
        p=p->next;
        fprintf(out,HEADER3_zg);
        count++;
    }
    if (count>0)
    {
        getchar();
        printf("nnn***文本文件保存完成，共%d条货物信息保存***n",count);
        getchar();
        saveflag=0;
    }
    else
    {
        system("cls");
        printf("没有货物信息，没有货物信息保存n");
        getchar();
    }
    fclose(out); /*关闭此文件*/
}
void Er_Save(Link L)
{
    FILE *out;
    Node *p;
    int count=0;
    if ((out=fopen("d:Goods","wb"))==NULL)
    {
        printf("打开文件失败！n");
        getchar();
        return;
    }
    p=L->next;

    while (p)
    {
        if (fwrite(p,sizeof(Node),1,out))
        {
            p=p->next;
            count++;
        }
        else
        {
            break;
        }
    }
    if (count>0)
    {
        getchar();
        printf("nnn***二进制文件保存完成，共%d条货物信息保存***n",count);
        getchar();
        saveflag=0;
    }
    else
    {
        system("cls");
        printf("没有货物信息，没有货物信息保存n");
        getchar();
    }
    fclose(out); /*关闭此文件*/
}
void Menu_sort_zg()
{
    system("cls");
    printf("nnn");
    printf("%30s%s"," ","     排序货物信息   nn");
    printf("%30s%s","********功能*******nn");
    printf("%30s%s","*      1.按名称   *nn");
    printf("%30s%s","*      2.按编号   *nn");
    printf("%30s%s","*      3.按销量*nn");
    printf("%30s%s","*      4.按利润*nn");
    printf("%30s%s","*      5.按保期  *nn");
    printf("%30s%s","*      6.返回     *nn");
    printf("%30s%s","*      7.退出     *nn");
    printf("%30s%s","********************n");
}
void Menu_sort_pt()
{
    system("cls");
    printf("nnn");
    printf("%30s%s","*      3.按售价   *nn");
    printf("%30s%s","*      4.按销量  *nn");
    printf("%30s%s","********************n");
}
void Menu_del()
{
    system("cls");
    printf("nnn");
    printf("%30s%s","     删除货物信息   nn");
    printf("%30s%s","*      3.返回     *nn");
    printf("%30s%s","*      4.退出     *nn");
    printf("%30s%s","********************n");
}
void Menu_Sea()
{
    system("cls");
    printf("nnn");
    printf("%30s%s","     查询货物信息   nn");
    printf("%30s%s","********************n");
}
void Menu_Qx()                   /*权限菜单*/
{
    system("cls");
    printf("nnn");
    printf("%25s%s","        欢迎进入             n");
    printf("%25s%s","     货物管理体统   nnn");
    printf("%25s%s","**********功能*********nn");
    printf("%25s%s","*        1.主管       *nn");
    printf("%25s%s","*        2.普通用户   *nn");
    printf("%25s%s","*        3.退出       *nn");
    printf("%25s%s","***********************n");
}
void Menu_zg()                       /*主管菜单*/
{
    system("cls");
    printf("nnn");
    printf("%15s%s","               货物管理体统                               nnn");
    printf("%15s%s","*****************主管功能******************nn");
    printf("%15s%s","*              1.录入货物信息             *n");
    printf("%15s%s","*              2.删除货物信息             *n");
    printf("%15s%s","*              3.查找货物信息             *n");
    printf("%15s%s","*              4.显示货物信息             *n");
    printf("%15s%s","*              5.差10天过物信息（促销)    *n");
    printf("%15s%s","*              6.统计货物数量（补货）     *n");
    printf("%15s%s","*              7.实时收益                 *n");
    printf("%15s%s","*              9.排序日期差               *n");
    printf("%15s%s","*              10.保存文件                *n");
    printf("%15s%s","*              11.返回                    *n");
    printf("%15s%s","*              12.退出                    *n");
    printf("%15s%s","*******************************************n");
}
void Menu_pt()                        /*普通菜单*/
{
    printf("%15s%s","*****************普通用户功能***************nn");
    printf("%15s%s","*              1.查找货物信息                   *n");
    printf("%15s%s","*              2.显示货物信息                   *n");
    printf("%15s%s","*              3.排序货物销量                   *n");
    printf("%15s%s","*              4.返回                           *n");
    printf("%15s%s","*              5.退出                          *n");
    printf("%15s%s","*************************************************n");
}
void Isaveflag(Link L)
{
    char ch;
    if (saveflag)
    {
        printf("您已经修改数据了，是否要保存退出（y/n）：");
        getchar();
        scanf("%c",&ch);
        if (ch=='y'||ch=='Y')
        {
            Wb_Save(L);
            Er_Save(L);
            exit(0);
        }
        else
            exit(0);
    }
    else
        exit(0);
}
int IsPassword()                      /*密码是否通过*/
{
    char password[7];
    char mypassword[]="123456";
    static int n=3;
    int i;
    system("cls");
    for (;n>0;n--)
    {
        switch(n)
        {
        case 1:
        case 2: printf("密码错误，您还有%d次机会,请再输入：",n);break;
        case 3: printf("请输入6位进入主管功能的密码：");getchar();break;
        }
        for ( i=0;i<6;i++)
        {
            password[i]=getch();
            printf("*");
        }
        getchar();
        password[6]='';
        if (strcmp(mypassword,password)==0)
        {
            printf("***密码正确***");
            getchar();
            return 1;
        }
    }
    printf("恭喜你，三次都输错了,无法再输入密码,按任意键返回...");
    getchar();
    return 0;
}

void Sort_goods(Link L,char s[])
{
    if (!L->next)
    {
        system("cls");
        printf("n没有货物信息，无法使用排序功能n");
        getchar();
        return;
    }
    else
    {
        if (strcmp(zg,s)==0)
        {
            system("cls");
            for (;;)
            {
                Menu_sort_zg();
                switch(select(1,7))
                {
                case 1:Sort_by_ways(L,zg,1);break;    /*名称*/
                case 2:Sort_by_ways(L,2);break;     /*编号*/
                case 3:Sort_by_ways(L,3);break;     /*销量*/
                case 4:Sort_by_ways(L,4);break;     /*利润*/
                case 5:Sort_by_ways(L,5);break;     /*保期*/
                case 6:return;break;
                case 7:Isaveflag(L);break;
                }
                getchar();
            }
        }
        else
        {
            system("cls");
            for (;;)
            {
                Menu_sort_pt();
                switch(select(1,pt,1);break;        /*名称*/
                case 2:Sort_by_ways(L,2);break;        /*编号*/
                case 3:Sort_by_ways(L,3);break;        /*售价*/
                case 4:Sort_by_ways(L,4);break;        /*销量*/
                case 5:Sort_by_ways(L,5);break;        /*销量*/
                case 6:return;break;
                case 7:Isaveflag(L);break;
                }
                getchar();
            }
        }
    }
}
void Sea_goods(Link L,char s[])
{
    if (!L->next)
    {
        system("cls");
        printf("n***没有货物记录，不能进入查询功能***n");
        return ;
    }
    else
    {
        system("cls");
        for (;;)
        {
            Menu_Sea();
            switch(select(1,4))
            {
            case 1:Sea_by_name(L,s);break;
            case 2:Sea_by_num(L,s);break;
            case 3:return;break;
            case 4:Isaveflag(L);break;
            }
            getchar();
        }
    }
}
void Del_goods(Link L)
{
    if (!L->next)
    {
        system("cls");
        printf("n***没有货物记录，不能使用删除功能***n");
        return ;
    }
    else
    {
        system("cls");
        for (;;)
        {
            Menu_del();
            switch (select(1,4))
            {
            case 1:Del_by_name(L);break;
            case 2:Del_by_num(L);break;
            case 3:return;break;
            case 4:Isaveflag(L);break;
            }
            getchar();
        }
    }
}
void main_zg(Link L)                        /*主管功能*/
{
    system("cls");
    for (;;)
    {
        Menu_zg();
        switch (select(1,12))
        {
        case 1:Add_goods(L);saveflag=1;break;                 /*增加货物信息*/
        case 2:Del_goods(L);break;                 /*删除学生信息*/
        case 3:Sea_goods(L,zg);break;         /*按编号名字查询*/
        case 4:system("cls");Disp(L,zg);break; 
        case 5:Dz_by_data(L);break;
        case 6:Buhuo(L);break;
        case 7:Disp(L,zg);Sum_Income(L);Disp(L,zg);break;
        case 9:Sort_goods(L,zg);break;
        case 10:Wb_Save(L);Er_Save(L);break;
        case 11:return;break;
        case 12:Isaveflag(L);break;
        }
        getchar();
    }
}
void main_pt(Link L)                        /*普通功能*/
{
    system("cls");
    for (;;)
    {
        Menu_pt();
        switch (select(1,5))
        {
        case 1:Sea_goods(L,pt);break;         /*按编号名字查询*/
        case 2:system("cls");Disp(L,pt);break; 
        case 3:Sort_goods(L,pt);break;
        case 4:return;break;
        case 5:Isaveflag(L);break;
        }
        getchar();
        system("cls");
    }
}
int main()
{
    Link L;
    FILE *in;
    Node *p,*r;
    int count=0;
    L=(Node *)malloc(sizeof(Node));
    L->next=NULL;
    r=L;
    if ((in=fopen("d:Goods","ab+"))==NULL) /*以追加方式打开二进制文件*/
    {
        printf("n***打开文件失败***n");
        exit(0);
    }
    while (!feof(in))
    {
        p=(Node *)malloc(sizeof(Node));
        if (fread(p,in))
        {
            p->next=r->next;
            r->next=p;
            count++;
        }
    }
    fclose(in);
    for (;;)
    {
        Menu_Qx();
        switch (select(1,3))
        {
        case 1:if(IsPassword())
               {
                   main_zg(L);
               }
               break;
        case 2:main_pt(L);break;
        case 3:Isaveflag(L);break;
        }
        getchar();
    }
    return 0;
}