press.c

书店管理系统

/*
#include<stdio.h>
#include<math.h>
#include<string.h>
#include<stdlib.h>
#include<pthread.h>
*/
/*
//以下变量的定义均在头文件中
extern  press_store[3];
extern  press_a_book[6];
extern  press_b_book[6];
extern  cursor_a;
extern  cursor_b;
*/
/*
//出版社出版书的延迟时间
struct timespec delay_2;
struct timespec delay_5;
delay_2.tv_sec=2;
delay_2.tv_nsec=0;
delay_5.tv_sec=5;
delay_5.tv_nsec=0;
*/

//A B 出版社初始化
void press_begin() 
{
     FILE *fp_a;
     FILE *fp_b;
     FILE * work;
     if ((fp_a=fopen("book_a","wb+"))!=NULL)
     {  
        printf("book_a has been builded!\n");
        fclose(fp_a);
     }
     else 
     { 
        printf("error: book_a has not been builded!\n");
     }
      
     if ((fp_b=fopen("book_b","wb+"))!=NULL)
     {  
        printf("book_b has been builded!\n");
        fclose(fp_b);
     }
     else 
     { 
        printf("error: book_b has not been builded!\n");
     }
     if ((work=fopen("work.txt","w+"))!=NULL)
     {  
        printf("work.txt has been builded!\n");
        fclose(work);
     }
     else 
     { 
        printf("error:work.txt has not been builded!\n");
     }

     //A 出版社出版书的种类
     press_a_book[0].kind="science";
     press_a_book[1].kind="foreign"; 
     press_a_book[2].kind="society";
     press_a_book[3].kind="health";
     press_a_book[4].kind="life";
     press_a_book[5].kind="sports";

     //B 出版社出版书的种类
     press_b_book[0].kind="science";
     press_b_book[1].kind="society";
     press_b_book[2].kind="health";
     press_b_book[3].kind="life";
     press_b_book[4].kind="sports";
     press_b_book[5].kind="education";
     printf("press_begin over!!\n\n");
}

//出版社注册书店C D E 
void license(char store_id)
{ 
          
      static int k=0;
      press_store[k].store_id=store_id;
      press_store[k].store_id=store_id;
      printf("%c licence success in A and B press!!\n",store_id);
      k++;
}

//出版社出版新书
void press_new(void * ab_press_id) 
{ 
  char press_id=*((char *)ab_press_id);
  FILE *fp;
  FILE *work;
  work=fopen("work.txt","a+");
  struct book new_book; 

  if(press_id=='A')
  {
       fp=fopen("book_a","ab");
       if (fp==NULL)
       {
          printf("A press cannot open book_a.txt in function press_new\n");
          pthread_exit(NULL);
         
       }
       if (work==NULL)
       {
          printf("A press cannot open work.txt in function press_new\n");             
       }
       while (cursor_a<100)
       {
             new_book.press_id=press_id; 
             new_book.kind=press_a_book[cursor_a%6].kind;
             new_book.name_id=(unsigned long)rand();
             new_book.cursor_name=cursor_a;
             new_book.lib_num=1000;
             new_book.f_y_n='n';
             new_book.g_y_n='n';
    
             fwrite(&new_book,sizeof(struct book),1,fp);
             printf("A press published a book:\n");
             printf("%c %s %d %d %d\n",new_book.press_id,new_book.kind,new_book.name_id,new_book.cursor_name,new_book.lib_num);
            /*
            if (work!=NULL)
            {     
               fprintf(work,"%c press has published a book:\n",press_id);
               fprintf(work,"%c----%s----%lu----%d\n",new_book.cursor_name, new_book.press_id,new_book.kind,new_book.name_id,new_book.lib_num); 
                //  fclose(work);
            }
            */
            
            if (strcmp(new_book.kind,press_store[0].kind[0])==0||strcmp(new_book.kind,press_store[0].kind[1])==0||strcmp(new_book.kind,press_store[0].kind[2])==0)
            {
              tell_store_buy(new_book,'C');
            }
            if (strcmp(new_book.kind,press_store[1].kind[0])==0||strcmp(new_book.kind,press_store[1].kind[1])==0||strcmp(new_book.kind,press_store[1].kind[2])==0||strcmp(new_book.kind,press_store[1].kind[3])==0)
            {
               tell_store_buy(new_book,'D');
            }
            tell_store_buy(new_book,'E');
                 
            cursor_a++;
            if (cursor_a<11)
            {
             // pthread_delay_np(&delay_2);
              sleep(2);
            }
            else
            {
             // pthread_delay_np(&delay_5);
              sleep(5);
            }
        
      }//end while  
      fclose(fp);
      fclose(work);
       
   }// end if A
   else if  (press_id=='B')
   {
            fp=fopen("book_b","ab");
            if (fp==NULL)
            {
               printf("B press cannot open book_b.txt in function press_new\n");
               pthread_exit(NULL);
            }
            if (work==NULL)
            {
               printf(" B press cannot open work.txt in function press_new\n");            
            }
         
            while(cursor_b<100)
            {
                new_book.press_id=press_id; 
                new_book.kind=press_b_book[cursor_b%6].kind;
                new_book.name_id=(unsigned long)rand();
                new_book.cursor_name=cursor_b;
                new_book.lib_num=1000;
                new_book.f_y_n='n';
                new_book.g_y_n='n';         
    
               fwrite(&new_book,sizeof(struct book),1,fp);
               printf("B press published a book:\n");
               printf("%c %s %d %d %d\n",new_book.press_id,new_book.kind,new_book.name_id,new_book.cursor_name,new_book.lib_num);
              /*
               if (work!=NULL)  
               {   
                 fprintf(work,"%c press has published a book:\n",press_id);
                 fprintf(work,"%c----%s----%lu----%d\n",new_book.cursor_name, new_book.press_id,new_book.kind,new_book.name_id,new_book.lib_num); 
                // fclose(work);
               }
               */
               
              if (strcmp(new_book.kind,press_store[0].kind[0])==0||strcmp(new_book.kind,press_store[0].kind[1])==0||strcmp(new_book.kind,press_store[0].kind[2])==0)
               {
                 tell_store_buy(new_book,'C');
               }
               if (strcmp(new_book.kind,press_store[1].kind[0])==0||strcmp(new_book.kind,press_store[1].kind[1])==0||strcmp(new_book.kind,press_store[1].kind[2])==0||strcmp(new_book.kind,press_store[1].kind[3])==0)
               {
                  tell_store_buy(new_book,'D');
               }
                  tell_store_buy(new_book,'E');
              
               cursor_b++;
               if (cursor_b<11)
               {
                  //pthread_delay_np(&delay_2);
                  sleep(2);
                }
                else
                {
                 // pthread_delay_np(&delay_5);
                   sleep(5);
                } 
         }//end while         
      
         fclose(fp);
         fclose(work);
     }//end else B
           
}//end press_new

//出版社留给书店的查询接口用于书店的主动订购
struct book* search_press(int cursor_name,char store_id,char press_id,struct book* a_book)
{
       long position=cursor_name * sizeof(struct book);
       struct book temp;
       int i=0;
       FILE * fp;
       FILE * work;
       work=fopen("work.txt","a+");
       if (work!=NULL)
       {
          fprintf(work,"%c store begin search in %c press before scrimber!\n",store_id,press_id);
       }
       else
       {
          printf("cannot open work.txt in function search_press\n");
       }
       if (press_id=='A')
       {
          fp=fopen("book_a","ab+");
          if (fp==NULL)
          {
             printf("%c store cannot open book_a.txt in function search_press\n",store_id);
             pthread_exit(NULL);
          }
          fseek(fp,position,0);
          fread(&temp,sizeof(struct book),1,fp);
          
          switch (store_id)
          {
          	     case  'C':
          	     {
          	     	  
                          for (i=0;i<3;i++)
                          {
                              if (strcmp(temp.kind,press_store[0].kind[i])==0)
                              {
                                 break;
                              } 
                          }
                          if (i==3)
                          {
                             printf("error in C!\n");
                             return NULL;
                          }
          	          printf("the %d name_id has %d lib_num\n",cursor_name,temp.lib_num);
          	     	  
                          //查询有书则购买 
          	          if (temp.lib_num>0)
          	          {
          	     	     a_book=scrimber_press(press_id, store_id,cursor_name, press_store[0].scrimbe_num[i],a_book);	
          	          }
                          else
                          {  
                             if (work!=NULL)
                             {
                                fprintf(work,"%c did not scrimbe book in press %c\n",store_id,press_id);
                                fclose(work);
                             }
                             return NULL;

                          }

          	         break;
          	     }
          	     case  'D':
          	     {
                          for (i=0;i<4;i++)
                          {
                              if (strcmp(temp.kind,press_store[1].kind[i])==0)
                              {
                                 break;
                              }
                          }
                          if (i==4)
                          {
                             printf("error in D!\n");
                             return NULL;