鏈接列表分段故障

Question

我遇到分段錯誤，我不知道問題出在哪裏。

#include "stdio.h" 
#include "stdlib.h" 

struct node { 
    int data; 
    struct node *next; 
    }; 
    struct node *head = NULL; 
    struct node * curr; 
    struct node * newNode; 

void createList(){ 

    int data,n , i ; 
    scanf("%d",&n); 
    for (i = 0 ; i < n ;i++){ 
     scanf("%d",&data); 
     curr = head; 
     newNode = (struct node*)malloc(sizeof(struct node)); 
     newNode->data=data; 
     newNode->next=NULL; 
     if (curr == NULL){ 
      head = newNode; 
     }else 
      while (curr->next != NULL){ 
       curr = curr->next; 
      } 
      curr->next = newNode; 
    } 

} 

int main(int argc, char const *argv[]) 
{ 

    createList(); 
    return 0; 
} 

請問你能弄清楚哪裏？ 第一次迭代很好，但當i = 1時，出現錯誤。

Answer 1

對齊是不足以使一個代碼塊用C ;-)

需要大括號。沒有它，curr->next = newNode;聲明在else塊之外，這不是你想要的。

if (curr == NULL){ 
       head = newNode; 
    } 
    else { 
       while (curr->next != NULL){ 
        curr = curr->next; 
       } 
       curr->next = newNode; 
    }