类的静态函数 静态成员（类的静态成员 属于 类）

#include <iostream>

using namespace std;

class school

{public:

    school(string t,string l)

    {tower=t;lake=l;}

    static string &getLib()//私有东西返回

    {return lib;}

    void dis()

    {cout<<"ta:"<<tower<<"hu:"<<lake<<"  tushuguan:"<<lib<<endl;}

private:

    string tower;

    string lake;

    static string lib;

};

string school::lib="";

int main()

{
  

    school   pk("boyata    ","weMeiHu ");

    school   bs("dianshiTa ","daminghu");

    school  xdf("leifengta ","xihu    ");

     //==============

//        pk.lib  +="aaa ";//我感觉不属于 类对象

//          pk.dis();

//         bs.lib  +="bbb ";

//          bs.dis();

//         xdf.lib +="ccc ";

//          xdf.dis();

     //==============

      school::getLib()+="aaa ";//类的静态成员属于类

        pk.dis();

      school::getLib()+="bbb ";

        bs.dis();

      school::getLib()+="ccc ";

        xdf.dis();

    cout << "Hello World!" << endl;

    return 0;

}