pta上提交后显示有三个段错误是哪里错啊?
#include <stdio.h>
#include <stdlib.h>
struct ListNode {
int data;
struct ListNode *next;
};
struct ListNode *createlist();
struct ListNode *deleteeven( struct ListNode *head );
void printlist( struct ListNode *head )
{
struct ListNode *p = head;
while (p) {
printf("%d ", p->data);
p = p->next;
}
printf("\n");
}
int main()
{
struct ListNode *head;
head = createlist();
head = deleteeven(head);
printlist(head);
return 0;
}
/* 你的代码将被嵌在这里 */
struct ListNode *createlist(){
struct ListNode *head,*q,*t;
head = (struct ListNode*)malloc(sizeof(struct ListNode));
q = head;
int a;
while(scanf("%d",&a),a != -1){
t = (struct ListNode*)malloc(sizeof(struct ListNode));
t->data = a;
q->next = t;
q = t;
}
q->next = NULL;
return head->next;
}
struct ListNode *deleteeven( struct ListNode *head ){
struct ListNode *q,*p;
while(head->data % 2 == 0 && head) head = head->next;
if(head == NULL) return NULL;
q = head;
p = q->next;
while(p->next){
p = q->next;
if(p->data % 2 == 0){
q->next = p->next;
}
else q = q->next;
}
return head;
}