求一段C++程序代码,能弄点注释

void Create()//创建链表
{
Node *p,*q;

p=(Node*)malloc(sizeof(Node)); //空结点
//p->next=NULL;
head=p;

char yesno='y';
int i=1;
while(yesno=='Y'||yesno=='y')
{

cout<<"请输入第"<<i<<"个学生的信息:"<<endl;

q=(Node*)malloc(sizeof(Node));
cout<<" 学号:";
cin>>q->id;

cout<<" 姓名:";
cin>>q->name;


cout<<" 性别(1/男,0/女):";
cin>>q->sex; 在里面加及 个科目成绩输入的代码

#include <iostream>
using namespace std;
class book
{
public:
int num;
float price;
book *next;
};
book*head=NULL;
book*creat()
{
book*p1,*p2;
p1=new book;
head=p1;
p2=p1;
cout<<"请输入图书的编号，以0结束"<<endl;
cin>>p1->num;
if (p1->num!=0)
{
cout<<"请输入图书的价格"<<endl;
cin>>p1->price;
}
else
{
delete p1;p2=NULL;p2->next=NULL;head=NULL;return head;
}
while (p1->num!=0)
{
p2=p1;
p1=new book;
cout<<"请输入图书的编号，以0结束"<<endl;
cin>>p1->num;
if (p1->num!=0)
{
cout<<"请输入图书的价格"<<endl;
cin>>p1->price;
}
p2->next=p1;
}
delete p1;
p2->next=NULL;
return head;
}
int main()
{
creat();
return 0;
}