我是初学C++，是为了完成作业而学，下面有这样一段使用静态成员函数小程序，各位大侠帮忙找出错误，并告如何修改，谢谢了：
#include<iostream.h>
#include<string.h>
class person{
public:
    char m_strName[20];
    long m_ID;
public:
    person(char*strName,long ID){strcpy(m_strName,strName);m_ID=ID;    }
    static long GetID()
    {return m_ID; }
};
void main()
{
    person person1("LiuJun",1101640524);
    cout<<"ID="<<person::GetID()<<'\n';
}

还有一题请教：
#include<iostream.h>
class point
{
protected:
int x,y;
public:
    point(int a,int b) {x=a;y=b; }
    int getX() {RETURN x; }
    int getY() {RETURN y; }
};
class Circle:public point
{
protected:
    int radius;
public:
    Circle(int a=0,int b=0,int r=0){radius=r;}
    int getRadius() {return radius; }
};
void main()
{
    Circle c(100, 150, 200);
    cout<<"x="<<c.getX()<<",y="<<c.getY()<<",radius="<<c.getRadius()<<end1;
}

我实在谢谢大侠解答，最后请教一题：
#include<iostream.h>
class Sample
{
private:
    int n;
public:
    Sample(int x) { n=x;}
    void SetValue(int x) { n=x;}
    void Display() {cout<<"n="<<n<<end1; }
};
void main()
{
  const Sample a(100);
  a.SetValue(0);
  a.Display();
}

#include<iostream.h>
class A
{
protected:
int a;
public:
    void SetData(int x) {a=x;}
    int GetData() {return a; }
};
class B
{
protected:
int b;
public:
    void SetData(int y) {b=y;}
    int GetData() {return b; }
};

class C:public A,public B
{
public:
    void SetData(int x, int y) {a=x; b=y;}
};
void main()
{
    C c;
    c.SetData(30,70);
    cout<<"a="<<c.GetData()<<",b="<<c.GetData()<<end1;
}