#include<iostream>
using namespace std;
struct Student
{
    int ID;
//    string name;
    Student *next;
};
Student *Create()
{
    Student *head,*p1,*p2;
    int n=0;
    head=NULL;
    p1=p2=new Student;
    cout<<"请输入用户ID:"<<endl;
    cin>>p1->ID;
//    cout<<"请输入用户姓名："<<endl;
//    cin>>p1->name;
    while(p1->ID!=0)
    {
        if(n==0)
        {
            head=p1;
        }
        else
        {
            p2->next=p1;
        }
        p2=p1;
        p1=new Student;
        cout<<"请输入用户ID：";
        cin>>p1->ID;
//        cout<<"请输入用户姓名：";
//        cin>>p1->name;
        n++;
    }
    p2->next=NULL;
    return head;
}
void OutPut(Student *head)
{
    Student *p=head;
    while(p)
    {
        cout<<"用户ID："<<p->ID<<endl;
//        cout<<"用户姓名："<<p->name<<endl;
        p=p->next;
    }
}
/*void Insert(Student *head)
{
    cout<<"输入要插入元素的位置:";
    int i;
    cin>>i;
    cout<<"输入要插入元素的ID：";
    int num;
    cin>>num;
    Student *p,*q,*s;
    int k=1;
    p=head;
    q=p->next;
    while(k<i&&q!=NULL)
    {
        p=q;
        q=q->next;
        k++;
    }
    if(k==i)
    {
        s=new Student;
        s->ID=num;
        p->next=s;
        s->next=q;
        cout<<"插入记录成功";
    }
}*/
int main()
{   
    Student *p=Create();
//    Insert(p);
    OutPut(p);
    return 0;
}
这个程序错在哪了？请大家看看

如果不使用typedef，Student *Create()函数应该这样定义struct Student *Create()
Student *head,*p1,*p2;应该这样定义struct Student *head,*p1,*p2;

二楼乱扯，你学过C++没有，人家定义的没错。

你这个代码完全没有问题！！
只是少一个头文件：#include <string>