能帮我看看我这个删除链表错在哪了吗

Question

#include<stdio.h>
#include<stdlib.h>
struct stu{
int num;
int scores;
struct stunext;};
struct stukiang(){
struct stu*head,*tail,p;
int num;
head=tail=NULL;
scanf("%d",&num);
while(num){
p=(struct stu)malloc(sizeof(struct stu));
scanf("%d",&p->num);
scanf("%d",&p->scores);
p->next=NULL;
if(head==NULL)
head=p;
else
tail->next=p;
tail=p;
num--;}
return head;}
int main(){
struct stu *head,*o,*p1,*p2;
int n;
scanf("%d",&n);
head=kiang();
p1=head;
p2=head->next;
if(head->num==n)
{o=head;
head=head->next;
}
while(p2!=NULL)
if(p2->num==n)
{p1->next=p2->next;
break;}
else
{p1=p2;
p2=p2->next;}
while(head!=NULL)
{printf("%d %d\n",head->num,head->scores);
head=head->next;}
return 0;}

Answer 1

这三处均是指针，分别改为
struct stu *next;
*p;
p=(struct stu *)malloc