删除单链表指定结点出现段错误？

Posted 2022-11-02 littlelittletiger

起初我是这么写的：

struct node * deletenode(struct node *head,int b)
    struct node *pre,*cur;
    pre=NULL;
    cur=head;
    if(head&&head->data==b)
        head=head->next;
        free(cur);
        
    else
        while(cur->data!=b)
            pre=cur;
            cur=cur->next;
        
        pre->next=cur->next;
        free(cur);    
    
    return head;

结果提交时说段错误，改成下面这样就通过了，暂时还不知道为啥。。。

struct node * deletenode(struct node *head,int b)
    struct node *pre,*cur;
    pre=NULL;
    cur=head;
    if(head&&head->data==b)
        head=head->next;
        free(cur);
        
    else
        while(cur)
        if(cur->data==b)
            pre->next=cur->next;
            free(cur);
         
        pre=cur;
        cur=cur->next;
    
    return head;