原涛

```c
#include
#include
#include

intlen=0;
typedefstructnode{
charS_num[10];
charname[15];
charP_num[2];
charC_num[2];
}N;

voidinput(Na[]){
intx=1,i=0,j,k,b;
Np[1];
while(x){
printf("请输入学号：");
scanf("%s",a[i].S_num);
printf("请输入姓名：");
scanf("%s",a[i].name);
printf("请输入系别：");
scanf("%s",a[i].P_num);
printf("请输入班号：");
scanf("%s",a[i].C_num);
i++;
printf("按0退出，按其他键继续：");
scanf("%d",&x);}
for(k=0;k

The issue contains a C program for student record management with sorting and filtering. The image link is broken. Start by understanding the existing code structure in the repository, likely in a main.c or similar file. Look for compilation errors, memory issues, or logic flaws in the provided snippet. Run any existing tests to see current behavior.

Rédigé par le modèle d'indexation à partir du texte de l'issue.