图书管理系统-优快云博客

#include"stdio.h"
#include"string.h"

struct book
{ char number[20];
   char name[20];
   char press[20];
   char writer[20];
   int   n;
   int   m;
}a[10];

int b;

void input()
{
   FILE *fp;
   char str2[10]={"     "};
   int i;
   if((fp=fopen("d:\\wen","w"))==NULL)
   {
    printf("Open failed！\n");
    return;
   }
   printf("\nHow many books do you want to input?\n");
   scanf("%d",&b);
   for(i=0;i<b;i++)
   {
    printf("Enter the %d book's number name press writer now all\n",i+1);
    scanf("%s%s%s%s%d%d",&a[i].number,&a[i].name,&a[i].press,&a[i].writer,&a[i].n,&a[i].m);
    fwrite(&a[i],sizeof(struct book),1,fp);
   }
   fclose(fp);
}

void Search()
{
FILE *fp;
    int w,i;
char str[20];
if((fp=fopen("d:\\wen","r"))==NULL)
{
  printf("Open failed\n");
     return;
}
for(i=0;i<b;i++)
    if(fread(&a[i],sizeof(struct book),1,fp)!=1)
  printf("file read error\n");
    printf("search by number--6\n");
    printf("search by name--7\n");
    printf("search by writer--8\n");
    printf("search by press--9\n");
    scanf("%d",&w);
printf("Enter the word you want to search:\n");
    scanf("%s",str);
switch(w)
{
  case 6:
     {
   for(i=0;i<b;i++)
     if(strcmp(a[i].number,str)==0)
   {
    printf("number: %s name: %s press: %s writer: %s now: %d all：%d\n",a[i].number,a[i].name,a[i].press,a[i].writer,a[i].n,a[i].m);
    break;
   }
     }
  break;
     case 7:
  {
   for(i=0;i<b;i++)
         if(strcmp(a[i].name,str)==0)
     {
    printf("number: %s name: %s press: %s writer: %s now: %d all：%d\n",a[i].number,a[i].name,a[i].press,a[i].writer,a[i].n,a[i].m);
        break;
    }
      }
      break;
     case 8:
   {
   for(i=0;i<b;i++)
      if(strcmp(a[i].press,str)==0)
      {
    printf("number: %s name: %s press: %s writer: %s now: %d all：%d\n",a[i].number,a[i].name,a[i].press,a[i].writer,a[i].n,a[i].m);
        break;
   }
   }
    break;
    case 9:
    {
      for(i=0;i<b;i++)
        if(strcmp(a[i].writer,str)==0)
     {
    printf("number: %s name: %s press: %s writer: %s now: %d all：%d\n",a[i].number,a[i].name,a[i].press,a[i].writer,a[i].n,a[i].m);
       break;
         }
  }
}
fclose(fp);
}

void borrow()
{
FILE *fp;
int i;
char xuehao[20],number2[20];
char jieyue[20]={"borrow："};
if((fp=fopen("d:\\wen00.txt","w"))==NULL)
{
   printf("Open failed\n");
  return;
  }
printf("Enter your number:\n");
scanf("%s",xuehao);
  printf("Enter the book's number which you want to borrow\n");
scanf("%s",number2);
    for(i=0;i<10;i++)
   if(strcmp(a[i].number,number2)==0)
    if(a[i].n>0)
   {
    a[i].n--;
    printf("borrow sucess!\n");
        if(fwrite(&xuehao[20],sizeof(xuehao[20]),1,fp)!=1)
       printf("file write error\n");
        if(fwrite(&jieyue[20],sizeof(jieyue),1,fp)!=1)
            printf("file write error\n");
        if(fwrite(&a[i],sizeof(struct book),1,fp)!=1)
            printf("file write error\n");
        break;
    }
    else
    printf("borrow failed!");
fclose(fp);
}

void giveback()
{
FILE *fp;
int i;
char xuehao[20],number2[20];
char guihuan2[20]={"give back"};
if((fp=fopen("d:\\wen00.txt","w"))==NULL)
{
   printf("cannot open file\n");
  return;
}
printf("Enter your number:\n");
scanf("%s",xuehao);
printf("Enter the book's number which you want to give back\n");
scanf("%s",number2);
    for(i=0;i<1000;i++)
   if(strcmp(a[i].number,number2)==0)
   {
  if(fwrite(&xuehao[20],sizeof(xuehao),1,fp)!=1)
             printf("file write error\n");
  if(fwrite(&guihuan2[20],sizeof(guihuan2),1,fp)!=1)
             printf("file write error\n");
        if(fwrite(&a[i],sizeof(a[i]),1,fp)!=1)
             printf("file write error\n");
         break;
   }
    printf("give back sucess!\n");
    fclose(fp);
}

void adddelet()
{
  FILE *fp;
char number3[20];
  int s,i,j,t;
   if((fp=fopen("d:\\wen00.txt","w"))==NULL)
{
   printf("cannot open file\n");
    return ;
   }
   printf("Chose what you want to do:");
   printf("add books--11\n");
   printf("delet books--12\n");
scanf("%d",&t);
   switch(t)
   {
   case 11:
    {
  printf("Enter the book'number which you want to add:");
     scanf("%s",number3);
     printf("How many books do you want to add?:");
      scanf("%d",&s);
     for(i=0;i<10;i++)
      if(strcmp(a[i].number,number3)==0)
         a[i].m=a[i].m+s;
    }
break;
    default :
    {
  printf("Enter the book'number which you want to delet:");
     scanf("%s",number3);
        for(i=0;i<10;i++)
            if(strcmp(a[i].number,number3)==0)
        for(;i<10;i++)
     {
   for(j=0;j<20;j++)
         a[i].number[j]=a[i+1].number[j];
         for(j=0;j<20;j++)
          a[i].name[j]=a[i+1].name[j];
    for(j=0;j<20;j++)
          a[i].press[j]=a[i+1].press[j];
        for(j=0;j<20;j++)
          a[i].writer[j]=a[i+1].writer[j];
       a[i].n=a[i+1].n;
       a[i].m=a[i+1].m;
     }
    }
   }
    fclose(fp);
}

int main()
{
printf("Welcome to labrary!\nChose what you want to do:\n");
     printf("Input book's information--1;\n");
printf("serach books--2;\n");
printf("borrow books--3;\n");
printf("add or delet books--4;\n");
printf("give back books--5;\n");
printf("quit--6;\n");
printf("Please chose zhe number:");
while(1)
{
    switch(getchar())
{
    case '1': input();break;
     case '2': Search();break;
     case '3': borrow() ;break;
     case '4': adddelet();break;
     case '5': giveback();break;

}
}
return 0;
}

图书馆管理系统