pro2.c

字符界面的图书管理程序,用链表实现的,可以实现借书还书功能

    printf("\nPlease input member's number:");
    scanf("%s",temp);
    pm=GetMember(temp);
    if(pm->money!=0)
    {
        printf("the reader must pay back fine first,go to pay back?y/n(y):");
        ch=getch();
        if(ch=='n'||ch=='N')
            return;
        else
            PayBack(pm);
            
    }
    while(1)
    {
        printf("\nplease input the booknumber to be returned:\n");
        scanf("%s",temnum);
        ReturnABook(pm,temnum);
        printf("return another one?y/n(y):");
        ch=getch();
        if(ch=='n'||ch=='N')
            break;
    }
}
void ReturnABook(MEMBER *h,char tem[])
{
    int i,m,n;
    m=BookCheck1(h,tem);
    if(m==-1)
        printf("the booknumber isnot borrowed by the people\n");
    else
    {
        n=h->count;
        for(i=m;i<10-n-1;i++)
        {
            strcpy(h->book[i],h->book[i+1]);
            h->bordate[i]=h->bordate[i+1];
            h->retdate[i]=h->retdate[i+1];
        }
        h->count++;
        for(pb=headb;pb!=NULL;pb=pb->next)
            if(strcmp(pb->num,tem)==0)
            {
                pb->numexist++;
                return;
            }
    }
}
void SearchBorrower()
{
    char ch;
    while(1)
    {
        printf("\nplease input the borrower's number:");
        scanf("%s",temp);
        pm=GetMember(temp);
        if(pm!=NULL)
            ShowBorrower(pm);
        printf("Search anoter one?y/n(y):");
        ch=getch();
        if(ch=='n'||ch=='N')
        break;

    }
}
void ShowBorrower(MEMBER * h)
{
    int i;
    printf("\nThe borrower's infomation is followed:\n");
    printf("name:%s\n",h->name);
    printf("number:%s\n",h->num);
    if(h->count==10)
    {
        printf("No book be borrowed\n");
        return;
    }
    printf("\nhave borrowed %d :\n",10-h->count);
    printf("num   booknumber          bordate   retdate\n");
    for(i=0;i<(10-(h->count));i++)
        printf(" %d:   %-20s%-10ld%-10ld\n",i+1,h->book[i],h->bordate[i],h->retdate[i]);
}
void DeleteBorrower()
{
    int i;
    char ch;
    printf("\nplease input borrower's number to be deleted:");
    scanf("%s",temp);
    pm=GetMember(temp);
    if(pm->count!=10)
    {
        printf("The borrower havenot return all the books.Are you want ot return books then delete?y/n(y)");
        ch=getch();
        if(ch=='n'||ch=='N')
            return;
        else
            for(i=0;i<10-pm->count;i++)
                ReturnABook(pm,pm->book[i]);
    }
    else
    {
        if(pm==headm)
            headm=headm->next;
        else if(pm==tailm)
        {
            tailm=qm;
            tailm->next=NULL;
        }
        else
            qm=pm->next;
        free(pm);
    }
}
void PrintBook()
{

    pb=headb;
    printf("\nbooknumber\t    name\t    sum_in_lib       exist    price\n");
    while(pb!=NULL)
    {
        printf("%-20s%-20s%-14d%-9d%-6.2d\n",pb->num,pb->name,pb->numbook,pb->numexist,pb->price);
        pb=pb->next;
    }
    printf("Press any key to continue...");
    getch();
}
void PrintBorrower()
{
    pm=headm;
    printf("\nname\t\t    number\t  borrowed      fine\n");
    while(pm!=NULL)
    {
        printf("%-20s%-16s%-12d%-6.1f\n",pm->name,pm->num,10-pm->count,pm->money);
        pm=pm->next;
    }
    printf("Press any key to continue...");
    getch();
}



void SaveBook()
{

    pb=headb;
    if((fp=fopen("book.dat","wb"))==NULL)
    {
        printf("cannot open this file.\n");
        getch();
        exit(0);
    }
    while(pb!=NULL)
    {
        fwrite(pb,sizeof(BOOK),1,fp);
        pb=pb->next;
    }
        printf("\nthe book data has been stored to book.dat");
        fclose(fp);
        getch();
}

void LoadBook()
{
    while(headb!=NULL)      /*释放已占用的内存*/
    {
        pb=headb;
        headb=headb->next;
        free(pb);
    }
    headb=tailb=NULL;
    if((fp=fopen("book.dat","ab+"))==NULL)
    {
        printf("cannot open this file.\n");
        getch();exit(0);
    }
    while(1)
    {
        qb=BUILDBOOK;
        if((fread(qb,sizeof(BOOK),1,fp))!=1)
            break;
        if(headb==NULL)
            headb=pb=qb;
        else
        {
            pb->next=qb;
            pb=qb;
        }
        
    }
    tailb=pb;
    tailb->next=NULL;
    fclose(fp);
}
void LoadMember()
{
    while(headm!=NULL)      /*释放已占用的内存*/
    {
        pm=headm;
        headm=headm->next;
        free(pm);
    }
    headm=tailm=NULL;
    if((fp=fopen("member.dat","ab+"))==NULL)
    {
        printf("cannot open this file.\n");
        getch();exit(0);
    }
    while(1)
    {
        qm=BUILDMEMBER;
        if((fread(qm,sizeof(MEMBER),1,fp))!=1)
            break;
        if(headm==NULL)
            headm=pm=qm;
        else
        {
            pm->next=qm;
            pm=qm;
        }
        
    }
    tailm=pm;
    tailm->next=NULL;
    fclose(fp);
}
void SaveMember()
{
    pm=headm;
    if((fp=fopen("member.dat","wb"))==NULL)
    {
        printf("cannot open this file.\n");
        getch();
        exit(0);
    }
    while(pm!=NULL)
    {
        fwrite(pm,sizeof(MEMBER),1,fp);
        pm=pm->next;
    }
        printf("\nthe member data has been stored to member.dat");
        fclose(fp);
        getch();
}
int CheckDate(long a)
{
    if(a/100000000>0)
    {
       printf("date format more than 8 bit,input again\n");
       return 0;
    }
    else if(a/10000000==0)
    {
        printf("date format less than 8 bit,input again\n");
        return 0;
    }
    else if((a%10000)/100>12)
    {
        printf("month format isnot fit,input again\n");
        return 0;
    }
    else if(a%100>=31)
    {
        printf("day format isnot fit,input again\n");
        return 0;
    }
    return 1;
}
void CheckFineMoney()
{
    int i,year,month,day;
    float m=0;
    long l,a,b;
    struct tm *tm;
    time(&l);
    tm=localtime(&l);                               
    year=tm->tm_year+1900;
    month=tm->tm_mon+1;
    day=tm->tm_mday;
    pm=headm;
    while(pm!=NULL)
    {
        b=(long)year*10000+month*100+day;
        for(i=0;i<10-pm->count;i++)
        {
            a=pm->retdate[i];
            if(b>a)
            {
                m+=(year-a/10000)*365*30*0.1;
                m+=(month-a%10000/100)*30*0.1;
                m+=(day-a%100)*0.1;
            }
        }
        pm->money=m;
        pm=pm->next;
    }
}
void PayBack(MEMBER *h)
{
    printf("\nThe reader should pay %5.2f for the fine.press any key to pay...",h->money);
    getch();
    h->money=0;
}
void CountBooks()
{
    int m=0,n=0;
    for(pb=headb;pb!=NULL;pb=pb->next)
    {
        m+=pb->numbook;
        n+=pb->numexist;
    }
    printf("number of total book is:%d\n",m);
    printf("number of borrowed book is:%d\n",m-n);
    printf("number of book exist in library is:%d\n",n);
    printf("press any key to continue.....");
    getch();
}
void CountMoney()
{
    long l=0;
    int sumbook=0;
    for(pb=headb;pb!=NULL;pb=pb->next)
    {
        l+=(pb->price)*(pb->numbook);
        sumbook+=pb->numbook;
    }
    printf("\namonut of money of books is %ld\naverage is %6.2f",l,l*1.0/sumbook);
    printf("\npress any key to continue.....");
    getch();
}
void Others()
{
    char *menu[]={"1 Show members information","2 Show books information",
    "3 Statistics book count","4 Statistics book money","5 Back up"};
    char ch;
    int i,flag=1;
    while(flag)
    {
        clrscr();
        for(i=0;i<5;i++)
            printf("\n\t\t%s",menu[i]);
        printf("\nPlease select one to run:");
        ch=getch();
        switch(ch)
        {
            case'1': PrintBorrower();   break;
            case'2': PrintBook();       break;
            case'3': CountBooks();      break;
            case'4': CountMoney();      break;
            case'5': flag=0;
        }
    }
}