f0810.cpp

it is a usefull thing

//=====================================
// f0810.cpp
// test class scope
//=====================================
#include<iostream>
using namespace std;
//-------------------------------------
class X{
public:
  void f1(){
    m=6;
    f2();
  }//----------------------------------
  void f2();
private:
  int m;
};//-----------------------------------
void X::f2(){
  cout<<"Data member: "<<m<<endl;     // X::m
  int m=7;
  cout<<"Local Variable: "<<m<<endl;  // X::m被掩藏
  cout<<"Data member: "<<X::m<<endl;
}//------------------------------------
int main(){  // 此处以下不属于类作用域但属于类定义作用域
  X x;
  x.f1();
}//====================================