出库表.cpp

由于当时只是学到C语言

#include "1.h"

//显示所有出库的记录
void out()
{FILE *form;
 FILE *fg;
 buy_list1 *a,*c,*heada;
 buy_list1 *b,*d,*headb;
 int i,k,zero=0;
 int count1;
 int count2;


a=NULL;
if((fg=fopen("pass2.txt","r+"))==NULL)//打开已经通过检查的文件*/
{printf("\n不能打开文件!\n");
exit(0);
}
fread(&count1,sizeof(int),1,fg);//读取pass2文件*/
if(count1){
for(i=0;i<count1;i++)
a=c=(buy_list1 *)malloc(sizeof(buy_list1));
heada=NULL;
for(i=0;i<count1;i++)
{if(i==0) heada=a;
 else a->next=c;
   a=c;
   c=(buy_list1 *)malloc(sizeof(buy_list1));
   fread(c,sizeof(buy_list1),1,fg);
}
a->next=c;
c->next=NULL;
a=heada->next;
fclose(fg);}
//printf("1");
if((form=fopen("out.txt","r+"))==NULL)//打开出库表
{printf("\n不能打开文件!\n");
 exit(0);
}

//把出库表读到内存
fread(&count2,sizeof(int),1,form);
b=d=(buy_list1 *)malloc(sizeof(buy_list1));
headb=NULL;
for(i=0;i<count2;i++)
{if(i==0) headb=b;
 else b->next=d;
   b=d;
   d=(buy_list1 *)malloc(sizeof(buy_list1));
   fread(d,sizeof(buy_list1),1,form);
}
fclose(form);//关闭文件
b->next=d;
d->next=NULL;


 while(a)
{
k=1;b=headb->next;
while(b)
{if(!strcmp(a->name,b->name)&&!strcmp(a->author,a->author)&&!strcmp(a->press,b->press))
 {b->num=b->num+a->num;k=0;break;}
 else b=b->next;
 }//

 if(k)
 {b=headb;
 while(b->next){b=b->next;}
count2++;	 
 b->next=(buy_list)malloc(sizeof(buy_list1));
 b=b->next;
  b->next=NULL;
  strcpy(b->name,a->name);
  strcpy(b->author,a->author);
  strcpy(b->press,a->press);
   strcpy(b->buyer,"空");
    strcpy(b->cla,"空");
  b->num=a->num;
 }

a=a->next;
}//没有的节点被新建,有的节点数目增加
 //不知道什么原因记录比真正的多1


//printf("\n\n%d\n\n",count2);
//把已经通过检查的信息与出库记录连接*/


if((fg=fopen("pass2.txt","w+"))==NULL)
{printf("\n不能打开文件!\n");
 exit(0);
}

fwrite(&zero,sizeof(int),1,form);
fclose(fg);

b=headb->next;
	printf(" \t\t\t以下是出库记录\n");	
	printf("\t书名            作者\t      出版社\t      数量\n");	
if((form=fopen("out.txt","w+"))==NULL)
{printf("\n不能打开文件!\n");
 exit(0);
}
fwrite(&count2,sizeof(int),1,form);//写进出库
while(b)//输出整个出库
{
		printf("\t%-15s %-15s%-15s   %d\n",b->name,b->author,b->press,b->num);
fwrite(b,sizeof(buy_list1),1,form);
b=b->next;
}

fclose(form);

//printf("%d",count2);

    system("pause");

}