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

                        else                    /*还有此书的情况*/
                        fclose(fp);             /*close book*/



                        fp=fopen("record.txt","a+");
                        student[n].cardnum=carnum;
                        fwrite(&student[n],sizeof(struct student),1,fp);
                        fclose(fp);


                        fp=fopen("book.txt","r");     /*打开书籍数据库*/
                        fp2=fopen("ExFile.txt","w");    /*写到借书临时数据库*/
            
                        for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)   /*检查所需借阅图书对应*/
                            {
                            if(strcmp(book[i].bookname,student[n].lendbook)==0)     /*对应上*/
                                {
                                book[i].turefalse--;                             /*被借出一本，藏书数-1*/
                                fwrite(&book[i],sizeof(struct book),1,fp2);       /*写回更改*/
                                continue;
                                }
                            fwrite(&book[i],sizeof(struct book),1,fp2);
                            }


                        fclose(fp);
                        fclose(fp2);


                        fp=fopen("book.txt","w");             /*写回到数据库*/
                        fp2=fopen("ExFile.txt","r");            /*读取临时数据库*/

                        for(i=0;fread(&book[i],sizeof(struct book),1,fp2)!=0;i++)   /*同上面操作*/
                            {
                            fwrite(&book[i],sizeof(struct book),1,fp);
                            }
                        fclose(fp);
                        fclose(fp2);
                        fopen("ExFile.txt","w");
                        fclose(fp2);


                        printf("\nBorrow seccessed!Press any key to continue.\n");


                        printf("\nDo you want to borrow another one? (Y/N)\n");
                        scanf("%s",&choise);
                        if(choise=='y'||choise=='Y')
                            {
                            clr();
                            goto ind1;
                            }
                        else
                            {
                            goto ind4;
                            }

                        }
                    else continue;
                    }

                }
            else continue;
            }


            {
            printf("\nSORRY!The book that you want to borrow CANNOT BE FOUND.\nPlease check it,press any key to continue.\n"); /*对应上面找不到此图书时输出的语句*/

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

            }


        }





    }
printf("\nWRONG card number!Please check it!\n"); /*对应上面找不到对应卡号的情况*/
ind4:
fclose(fp);
printf("\nPress any Key to exit this mode.");
getch();
return;
}












showcard()     /*显示所有的卡号资料*/
{
FILE *fp;
int i=0;
int n=0;
int p=0;

fp=fopen("card.txt","r");
for(i=0;fread(&card[i],sizeof(struct card),1,fp)!=0;i++)
    {
    if(i%5==4)
        {
        printf("CARD number : %d  student name  : %s  class  : %s\n",card[i].cardnum,card[i].studentname,card[i].studentclass);
        n=n+1;
        p++;
        printf("\n\nPress Any Key to continue...\n");
        getch();
        clr();
        }
    else
        {
        printf("CARD number : %d  student name  : %s  class  : %s\n",card[i].cardnum,card[i].studentname,card[i].studentclass);
        n=n+1;
        p++;
        }
    }


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

}












cardcount()                             /*卡号对应资料显示，按卡号*/
{
FILE *fp,*fp2;                          /*fp为打开卡号数据库文件指针，fp2为查找对应借书资料的文件指针*/
int i,n,p;                              /*p为查找结果计数器，n为借书情况计数器*/
int cardnum;
char choise=0;

once:
n=0;
p=0;
printf("Input your card Number:\n");

scanf("%d",&cardnum);


fp=fopen("card.txt","r");     /*与数据库对照*/


for(i=0;fread(&card[i],sizeof(struct card),1,fp)!=0;i++)
    {
    if(card[i].cardnum==cardnum)   /*卡号存在*/
        {
        clr();
        p++;                       /*查到了结果，计数器+1*/
        printf("CARD number:%d  Student Name :%s  Class :%s\n\n",card[i].cardnum,card[i].studentname,card[i].studentclass);


        fp2=fopen("record.txt","r");      /*打开借书操作数据库，调出借书的数据*/
        for(i=0;fread(&student[i],sizeof(struct student),1,fp2)!=0;i++)
            {
            if(student[i].cardnum==cardnum)
                {
                printf("The book you borrowed: %s \n",student[i].lendbook);
                n++;            /*查到结果，计数器+1*/
                }
            else continue;
            }
        fclose(fp2);
        printf("\nYou has borrowed %d books.\n",n);
        getch();
        }
    else continue;
    }



fclose(fp);
if(p==0)              /*计数器为0，即没有找到书籍*/
    {
    printf("You have input a WRONG number,please CHECK it and input again.\n");
    getch();
    }





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

    }
return;
}









cardname()                             /*卡号对应资料显示，按姓名*/
{
FILE *fp,*fp2;                  /*fp为打开卡号数据库文件指针，fp2为查找对应借书资料的文件指针*/
int i,n,p;                      /*p为查找结果计数器，n为借书情况计数器*/
char name[10];
int cardnum;
char choise=0;


once:
n=0;
p=0;
printf("Input your Name:\n");

scanf("%s",name);


fp=fopen("card.txt","r");     /*与数据库对照*/


for(i=0;fread(&card[i],sizeof(struct card),1,fp)!=0;i++)
    {
    if(strcmp(card[i].studentname,name)==0)   /*姓名正确*/
        {
        p++;
        clr();

        cardnum=card[i].cardnum;
        printf("CARD number:%d  Student Name :%s  Class :%s\n\n",card[i].cardnum,card[i].studentname,card[i].studentclass);


        fp2=fopen("record.txt","r");      /*打开借书操作数据库，调出借书的数据*/
        for(i=0;fread(&student[i],sizeof(struct student),1,fp2)!=0;i++)
            {
            if(student[i].cardnum==cardnum)
                {
                printf("The book you borrowed: %s \n",student[i].lendbook);
                n++;
                }
            else continue;
            }
        fclose(fp2);
        printf("\nYou has borrowed %d books.\n",n);
        getch();
        }
    else continue;
    }



fclose(fp);
if(p==0)           /*未找到对应姓名*/
    {
    printf("You have input a WRONG name,please CHECK it and input again.\n");
    getch();
    }




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

    }
return;
}








delcard()  /*删除卡号*/
{
FILE *fp,*fp2;
int i;
int cardnum;
char choice;

fp=fopen("card.txt","r");
fp2=fopen("ExFile.txt","w");

printf("WARNING!\nThis operation will delete all the data of the card number you want to delete.\n"
"Are you sure want to do it?(Y/N)\n");

if(getchar()=='Y'||getchar()=='y')     /*选择Y的话,执行操作*/
    {
    printf("Input the card number you want to delete.\n");
    scanf("%d",&cardnum);
    for(i=0;fread(&card[i],sizeof(struct card),1,fp)!=0;i++)
        {
        if(card[i].cardnum!=cardnum)
            {
            fwrite(&card[i],sizeof(struct card),1,fp2);
            }
        }
    fclose(fp);
    fclose(fp2);

    printf("Are you sure?(Y/N)\n");
    scanf("%s",&choice);
    if(choice=='y'||choice=='Y')
        {
        fp=fopen("card.txt","w");
        fp2=fopen("ExFile.txt","r");
        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");
        getch();
        return;
        }
    else        /*对应第二次询问是否要删除*/
        {
        printf("Press any key to continue.\n");
        getch();
        return;
        }
    }
else         /*对应第一次问是否要执行此操作*/
    {
    printf("Press any key to continue.\n");
    getch();
    return;
    }
printf("Press any Key to exit this mode.");
getch();
return;
}







addcard()    /*添加卡号操作*/
{
FILE *fp;
char choice='y';
int i=0;

jump:
clr();
fp=fopen("card.txt","a+");
while(choice=='y'||choice=='Y')
    {
    clr();
    printf("Input your card number:\n");
    scanf("%d",&card[i].cardnum);
    printf("Input your name:\n");
    scanf("%s",card[i].studentname);
    printf("Input your class:\n");
    scanf("%s",&card[i].studentclass);
    fwrite(&card[i],sizeof(struct card),1,fp);
    fclose(fp);
    printf("Input seccessed!Press any key to continue.\n");
    getch();
    printf("Do you want to create another one?(Y/N)\n");
    scanf("%s",&choice);
    goto jump;
    }
fclose(fp);
printf("Press any key to continue.\n");
printf("Press any Key to exit this mode.");
getch();
return;
}








changecard()
{
FILE *fp,*fp2;
char choice;
int i,cardnum;


fp=fopen("card.txt","r");
fp2=fopen("ExFile.txt","w");   /*写入到临时文件*/

printf("input the CAR NUMBER you want to change:\n");
scanf("%d",&cardnum);

for(i=0;fread(&card[i],sizeof(struct card),1,fp)!=0;i++)
    {
    clr();
    if(cardnum==card[i].cardnum)
        {
        printf("\nCard number : %d  student name : %s   class : %s \n",card[i].cardnum,card[i].studentname,card[i].studentclass);