C语言删除节点

#include<stdio.h>
typedef struct stu
{int data;
struct stu *next;
}aa;
aa *fun()
{ aa *t,*p,*h;
int c;
h=(aa*)malloc(sizeof(aa));
p=h;
printf("input:\n");
scanf("%d",&c);
while(c!=-1)
{
t=(aa*)malloc(sizeof(aa));
t->data=c;
p->next=t;
p=t;
printf("input:\n");
scanf("%d",&c);
}
t==NULL;
return h;
}

aa *del(aa *h)
{
aa *t,*p;
int n;
p=h;
printf("yao san de shu :\n");
scanf("%d,&n");
while(p->next!=NULL&&p->data!=n)
{ t=p;p=p->next; }
if(p==NULL) {h=p->next;}
else { t->next=p->next; }
return h;
}

main()
{
aa *head,*p;
head=fun();
del(head);
p=head;
while(p->next!=NULL)
{
p=p->next;
printf(" %d ",p->data);
}
}