library.c

纯循环实现图书馆管理系统。具备基础功能。普通界面。入门级程序

        printf("select what you want to change:(input 0-3)\n\n");
        printf("1 : change the CARD number\n");
        printf("2 : change the name\n");
        printf("3 : change the class\n");
        printf("0 :     <EXIT>\n");
        printf("Please slect one:\n");
        scanf("%s",&choice);

        clr();
        switch(choice)
            {
            case '1':
                {
                printf("input new CARD number:\n");
                scanf("%d",&card[i].cardnum);
                fwrite(&card[i],sizeof(struct card),1,fp2);
                }break;
            case '2':
                {
                printf("input new name:\n");
                scanf("%s",card[i].studentname);
                fwrite(&card[i],sizeof(struct card),1,fp2);
                }break;
            case '3':
                {
                printf("input new class:\n");
                scanf("%s",card[i].studentclass);
                fwrite(&card[i],sizeof(struct card),1,fp2);
                }break;
            case '0':
                 {
                 printf("\nPress any key to EXIT this mode.\n");
                 getch();
                 };break;
            default:printf("WRONG select!");break;
            }
        continue;

        }   /*修改结束*/


    fwrite(&card[i],sizeof(struct card),1,fp2);    /*写入修改后的结果*/
    }


fclose(fp);
fclose(fp2);
fp=fopen("card.txt","w");
fp2=fopen("ExFile.txt","r");  /*从临时文件写到数据库中*/

for(i=0;fread(&card[i],sizeof(struct card),1,fp2)!=0;i++)
    {
    fwrite(&card[i],sizeof(struct card),1,fp);
    }
fclose(fp);
fclose(fp2);
fp2=fopen("ExFile.txt","w");
fclose(fp2);

printf("Press any key to continue.\n");
getchar();
printf("Press any Key to exit this mode.");
getch();
return;
}
































chabook()          /*图书查阅索引页*/
{
int ch5=1;


ind1:
ch5=1;
while(ch5!=0)
    {
    clr();
    printf("\n--------------- SEARCH INDEX --------------\n");
    printf("       (Input 0-4 to slect search mode)\n\n");
    printf("              1 : <BY book name>\n");
    printf("              2 : <BY author>\n");
    printf("              3 : <BY public>\n");
    printf("              4 : <BY ISBN number>\n");
    printf("              0 : <BACK>\n");


    scanf("%d",&ch5);      /*读入上面的选择*/

    switch(ch5)              /*选择的判断*/
        {
        case 1:{clr();findbook();goto ind1;};
        case 2:{clr();bookaut();goto ind1;};
        case 3:{clr();bookpub();goto ind1;};
        case 4:{clr();booknum();goto ind1;};
        case 0:{clr();return;};
        default:{clr();printf("WRONG select!\n");getch();goto ind1;};
        }
    }



return;
}













showbook()     /*显示所有的书籍，包括书目数量和书本数量的统计*/
{
FILE *fp;
int i=0;
int n=0;
int p=0;

fp=fopen("book.txt","r");
for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
    {
    if(i%5==4)
        {
        printf("ISBN number : %d  book name  : %s  author  : %s  public  : %s\nNow we have [ %d ] These Books.\n",book[i].booknum,book[i].bookname,book[i].bookcreat,book[i].publi,book[i].turefalse);
        n=n+1;
        p=p+book[i].turefalse;
        printf("\n\nPress Any Key to continue...\n");
        getch();
        clr();
        }
    else
        {printf("ISBN number : %d  book name  : %s  author  : %s  public  : %s\nNow we have [ %d ] These Books.\n",book[i].booknum,book[i].bookname,book[i].bookcreat,book[i].publi,book[i].turefalse);
        n=n+1;
        p=p+book[i].turefalse;
        }
    }


fclose(fp);
printf("\nTotally has %d books.\n",n);
printf("The total number of books is :  [ %d ]\n\n",p);
printf("Press any key to continue.\n");
printf("Press any Key to exit this mode.");
getch();
return;

}







addbook()      /*添加书籍*/
{
FILE *fp;
int i=0;
char choice='y';

fp=fopen("book.txt","a+");

while(choice=='y'||choice=='Y')
    {
    clr();
    i++;
    printf("Input the ISBN number:\n");
    scanf("%d",&book[i].booknum);
    printf("input the book name:\n");
    scanf("%s",book[i].bookname);
    printf("input the author:\n");
    scanf("%s",book[i].bookcreat);
    printf("input the public:\n");
    scanf("%s",book[i].publi);
    printf("Input the number of the book we have:\n");
    scanf("%d",&book[i].total);
    book[i].turefalse=book[i].total;
    fwrite(&book[i],sizeof(struct book),1,fp);
    printf("Do you want to create another one?(Y/N)\n");
    scanf("%s",&choice);
    }
fclose(fp);
printf("Press any Key to exit this mode.");
getch();
return;
}













findbook()       /*书籍查找,按书名*/
{
FILE *fp,*fp2;    /*fp为书名对照打开数据库文件指针，fp2为打开借书记录数据库文件指针*/
char bookname[10];          /*存放书名*/
int ture,i,n=0;            /*ture为是否查到结果的计数器，n为统计被借多少次的计数器*/
char choise=0;



ind1:
n=0;
ture=0;
fp=fopen("book.txt","r");
printf("\nInput the book name:\n");
scanf("%s",bookname);


for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
    {

    if(strcmp(bookname,book[i].bookname)==0)     /*对照书名*/
        {
        ture++;       /*找到相应结果，查找结果计数器+1*/
        clr();

        if(book[i].turefalse!=0)           /*书籍剩余册数判断*/
            {
            printf("\nISBN number : %d  book name: %s  author: %s   public  : %s\nNow we have [ %d ] These Books,you can borrow it.\n\n",book[i].booknum,book[i].bookname,book[i].bookcreat,book[i].publi,book[i].turefalse);

            fp2=fopen("record.txt","r");      /*打开借书操作数据库，调出借书的数据，查看此书被哪些人借阅*/
            for(i=0;fread(&student[i],sizeof(struct student),1,fp2)!=0;i++)
                {
                if(strcmp(student[i].lendbook,bookname)==0)
                    {
                    printf("These books had been borrowed by this card number: %d \n",student[i].cardnum);  /*出于保护隐私，这里不把卡号对应到名字上去。对应的话，用for循环再调用一次card.txt，然后寻找对应即可。*/
                    n++;        /*找到一个记录，借出记录计数器+1*/
                    }
                else continue;
                }
            fclose(fp2);
            printf("\nThis book already be borrowed by  [ %d ]  peoples.\n",n);
            getch();
            }
        else
            {
            printf("\nISBN number : %d  book name: %s  author: %s   public  : %s\nNow we have [ %d ] These Books.",book[i].booknum,book[i].bookname,book[i].bookcreat,book[i].publi,book[i].turefalse);
            printf("\nSORRY ! All of these books had been borrowed.\n");
            getch();
            }

        }
    else continue;
    }




fclose(fp);    /*关闭BOOK数据库*/

if(ture==0)    /*查找结果计数器为0，即没找到结果*/
    {
    printf("\nWe don't have this book,please check it.\n");
    getch();
    }




{
clr();

                        printf("\nDo you want to input the book name once? (Y/N)\n");
                        scanf("%s",&choise);
                        if(choise=='y'||choise=='Y')
                            {
                            clr();
                            goto ind1;
                            }
                        else
                            {
                            clr();
                            return;
                            }
    }
return;
}







booknum()       /*书籍查找,按ISBN号*/
{
FILE *fp,*fp2;
int ISBN;
int ture,i,n=0;
char choise=0;
char bookname[10];


ind1:
n=0;
ture=0;
fp=fopen("book.txt","r");
printf("\ninput the ISBN number:\n");
scanf("%d",&ISBN);


for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
    {

    if(book[i].booknum==ISBN)
        {
        ture++;
        clr();
        *bookname=*book[i].bookname;
        if(book[i].turefalse!=0)           /*书籍状态判断*/
            {
            printf("\nISBN number : %d  book name: %s  author: %s   public  : %s\nNow we have [ %d ] These Books,you can borrow it.\n\n",book[i].booknum,book[i].bookname,book[i].bookcreat,book[i].publi,book[i].turefalse);

            fp2=fopen("record.txt","r");      /*打开借书操作数据库，调出借书的数据，查看此书被哪些人借阅*/
            for(i=0;fread(&student[i],sizeof(struct student),1,fp2)!=0;i++)
                {
                if(strcmp(student[i].lendbook,bookname)==0)
                    {
                    printf("These books had been borrowed by this card number: %d \n",student[i].cardnum);
                    n++;
                    }
                else continue;
                }
            fclose(fp2);
            printf("\nThis book already be borrowed by  [ %d ]  peoples.\n",n);
            getch();
            }
        else
            {
            printf("\nISBN number : %d  book name: %s  author: %s   public  : %s\nNow we have [ %d ] These Books,you can borrow it.\n\n",book[i].booknum,book[i].bookname,book[i].bookcreat,book[i].publi,book[i].turefalse);
            printf("\nSORRY ! All of these books had been borrowed.\n");
            getch();
            }
        }

    else continue;
    }

fclose(fp);

if(ture==0)
    {
        printf("\nWe don't have this book,please check it.\n");
        getch();
        }



        {
        clr();
                        printf("\nDo you want to input the book name once? (Y/N)\n");
                        scanf("%s",&choise);
                        if(choise=='y'||choise=='Y')
                            {
                            clr();
                            goto ind1;
                            }
                        else
                            {
                            clr();
                            return;
                            }

    }
return;
}







bookaut()       /*书籍查找,按作者*/
{
FILE *fp,*fp2;    /*fp2为书籍被借情况的文件指针*/
char bookname[10];
char bookaut[10];
int ture,p,i,n=0;
char choise=0;



ind1:
n=0;
p=0;          /*p为是否查到书籍的计数器*/
fp=fopen("book.txt","r");
printf("\ninput the book author:\n");
scanf("%s",bookaut);


for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
    {

    if(strcmp(bookaut,book[i].bookcreat)==0)
        {
        clr();
        p++;
        *bookname=*book[i].bookname;
        if(book[i].turefalse!=0)           /*书籍状态判断*/
            {
            printf("\nISBN number : %d  book name: %s  author: %s   public  : %s\nNow we have [ %d ] These Books,you can borrow it.\n\n",book[i].booknum,book[i].bookname,book[i].bookcreat,book[i].publi,book[i].turefalse);


            fp2=fopen("record.txt","r");      /*打开借书操作数据库，调出借书的数据，查看此书被哪些人借阅*/
            for(i=0;fread(&student[i],sizeof(struct student),1,fp2)!=0;i++)
                {
                if(strcmp(student[i].lendbook,bookname)==0)
                    {
                    printf("These books had been borrowed by this card number: %d \n",student[i].cardnum);  /*出于保护隐私，这里不把卡号对应到名字上去。对应的话，用for循环再调用一次card.txt，然后寻找对应即可。*/
                    n++;
                    }
                else continue;
                }
            fclose(fp2);
            printf("\nThis book already be borrowed by  [ %d ]  peoples.\n",n);