韦锐敏

```C
#include
#include
#include
#define MAXSIZE 100
typedef struct
{
int xuehao;
char name[20];
char xibie[20];
int banhao;
}node;
typedef struct
{
node a[MAXSIZE+1];
int len;
}table;
void init(table *s)
{
s->len=0;
}
void creat(table *s,char *filename)
{
int i,d;
FILE *fp;
fp=fopen(filename,"r");
if(fp)
{
fscanf(fp,"%d",&s->len);
for(i=1;i<=s->len;i++)
{
fscanf(fp,"%s%d%s%d",&s->a[i].xibie,&s->a[i].xuehao,&s->a[i].name,&s->a[i].banhao);
}
fclose(fp);
}
else
s->len=0;
}
void display(table *s)
{
int i;
printf("系别 学号 姓名 班号\n");
for(i=1;i<=s->len;i++)
{
printf("%s %d %s %d\n",s->a[i].xibie,s->a[i].xuehao,s->a[i].name,s->a[i].banhao);
}
}
table *quicksort(table *s,int left,int right)
{
int i,j;
if(lefta[0]=s->a[i];
do
{
while((s->a[j].xuehao>s->a[0].xuehao)&&ia[i]=s->a[j];
i++;
}
while((s->a[i].xuehaoa[0].xuehao)&&ia[j]=s->a[i];
j--;
}
}while(i!=j);
s->a[i]=s->a[0];
quicksort(s,left,i-1);
quicksort(s,i+1,right);
}
return s;
}
void erfen(table *s,char xibiek[20])
{
int low=1,high=s->len,mid;
while(low<=high)
{
mid=(low+high)/2;
if(strcmp(s->a[mid].xibie,xibiek)==0)
printf("%s %d %s %d\n",s->a[mid].xibie,s->a[mid].xuehao,s->a[mid].name,s->a[mid].banhao);
if(strcmp(s->a[mid].xibie,xibiek)==1)
high=mid-1;
else
low=mid+1;
}
}
void jiansuo(table *s,char xibiek[20])
{
int i;
printf("系别 学号 姓名 班号\n");
for(i=1;i<=s->len;i++)
{
if(strcmp(s->a[i].xibie,xibiek)==0)
printf("%s %d %s %d\n",s->a[i].xibie,s->a[i].xuehao,s->a[i].name,s->a[i].banhao);
}
}
int main()
{
table *s;
char a[20],filename[20];
int i=0;
s=(table *)malloc(sizeof(table));
init(s);
printf("输入存放信息的文件名 ");
gets(filename);
creat(s,filename);
printf("输出创建的学生借书证信息:\n");
display(s);
quicksort(s,1,s->len);
printf("输出排序后的借书证信息:\n");
display(s);
printf("请输入检索的系别名: ");
scanf("%s",&a);
erfen(s,a);
printf("请输入检索的系别名2: ");
scanf("%s",&a);
jiansuo(s,a);
return 0;
}
```

The issue contains a C program for managing student library cards with sorting and search functions. The problem is not described; the user posted code and screenshots. To understand the issue, examine the code for logical errors, such as the binary search (erfen) that prints matches but may have incorrect comparison logic (strcmp returns 1 for greater, not >0). Review the quicksort implementation for potential bugs. Run the program with sample data to see if it behaves as expected.

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