嘗試調用我的deleteStudent函數時出現分段錯誤（核心轉儲）

Question

我嘗試製作關於學生註冊的程序。

這是我的頭文件：

#ifndef STUDENTREGISTRATION_H_ 
#define STUDENTREGISTRATION_H_ 
typedef struct { 
char name[30]; 
char surname[30]; 
char faculty[30]; 
char department[30]; 
int age; 
int grade; 
int count; 
} STUDENT_STRUCT, *STUDENT; 

STUDENT_STRUCT students[100]; 
STUDENT_STRUCT empty; 
void *data_init(); 
void *data_set(STUDENT s); 
void addStudent(int count,STUDENT s); 
void displayList(int count); 
void free_list(STUDENT s); 
void deleteStudent(int index,int count); 
void Choice(); 


#include <stdio.h> 
#include <stdlib.h> 
#include "string.h" 
#include "StudentREGISTRATION.h" 

void *data_set(STUDENT s) { 

s = students; 
return s; 
} 
void addStudent(int count,STUDENT s) { 

printf("Please enter an information about student:\n"); 
printf("Name:"); 
scanf("%s", s->name); 
printf("Surname:"); 
scanf("%s", s->surname); 
printf("Faculty:"); 
scanf("%s", s->faculty); 
printf("Department:"); 
scanf("%s", s->department); 
printf("Age:"); 
scanf("%d", &s->age); 
printf("Grade:"); 
scanf("%d", &s->grade); 
students[count].age = s->age; 
students[count].grade=s->grade; 
strcpy(students[count].department,s->department); 
strcpy(students[count].faculty,s->faculty); 
strcpy(students[count].name,s->name); 
strcpy(students[count].surname, s->surname); 
free_list(s); 
} 

void displayList(int count) { 
int i; 
for (i = 0; i < count; i++) { 
    if(students[i].name[0] != "\0" && students[i].surname[0] != "\0" && students[i].faculty[0] !=  "\0" && students[i].department[0] !="\0"&&students[i].age != 0 && students[i].grade != 0) 
    { 
     printf("%d.) %s %s %s %s %d %d \n", i + 1, students[i].name, 
     students[i].surname, students[i].faculty, 
     students[i].department, students[i].grade, students[i].age); 
    } 

} 
} 
void free_list(STUDENT s) { 

free(s); 
} 
void deleteStudent(int index,int count) { 
int i; 
for(i=0;i<count;i++) 
{ 
    if(index-1==i) 
    { 
     students[i].name[0]="\0"; 
     students[i].surname[0]="\0"; 
     students[i].department[0]="\0"; 
     students[i].faculty[0]="\0"; 
     students[i].age=0; 
     students[i].grade=0; 
    } 
} 
displayList(count); 
} 
void *data_init() 
{ 
STUDENT s=(STUDENT)malloc(sizeof(STUDENT_STRUCT)); 
return s; 
} 
void Choice() { 
STUDENT s; 
int a=0; 
printf("Enter your choice to do with a program\n"); 
printf("Press A for adding student\n"); 
printf("Press L to display a student list\n"); 
printf("Press D for deleting student\n"); 
printf("Press E for exit\n"); 
char choice = ' '; 
int index; 
while (choice != 'E') { 

    printf("Your choice:"); 
    scanf("%c", &choice); 
    switch (choice) { 
    case 'A': 
     s=data_init(s); 
     addStudent(a,s); 
     a++; 
     break; 
    case 'L': 

     displayList(a); 
     break; 
    case 'D': 
     printf("Enter an index:"); 
     scanf("%d ",index); 
     deleteStudent(index,a); 
     break; 
    } 
} 

exit(1); 
} 

我得到分段錯誤（代碼轉儲）錯誤，當程序試圖運行在交換機的情況下刪除功能。在這段代碼中我的錯在哪裏，我想它是關於指針的一切。但我嘗試爲每個學生分配和釋放。問題在哪裏，如果有人告訴我，我會感激。謝謝。

Answer 1

我首先嚐試在做任何事情之前檢查索引是否在0和count之間。這可能會導致錯誤。另外，你似乎沒有用#endif關閉頭文件中的#ifndef。

也有人指出，scanf應該給一個地址，而不是一個變量。例如：

scanf("%d ", &z);