探索更好的方法：访问基类的私有成员

2008-04-23 05:52:36 109 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Qt QChart实战：从零打造一个实时温度监控仪表盘（附完整源码）本文详细介绍了如何使用Qt QChart模块从零构建一个工业级实时温度监控仪表盘。通过实战案例，展示了波形图的绘制、坐标轴配置、数据流模拟等关键技术，并提供了完整的源码实现，帮助开发者快速掌握Qt在数据可视化领域的应用。阅读详情

修改程序，我是加了两个函数，想知道有没有更好的修改方法
修改前：
#include <iostream.h>
class base
{
private:
int n1;
protected:
int k1;
public:
base(){n1=0;k1=1;}
void fun1(){cout<<n1<<k1<<endl;}
};
class d1:public base
{
private:
int n2;
protected:
int k2;
public:
d1(){n2=10;k1=11;}
void fun2(){cout<<n1<<k1<<endl; cout<<n2<<k2<<endl;}//
};

class d2:public d1
{
private:
int n3;
protected:
int k3;
public:
d2(){n3=20;k3=21;}
void fun3(){cout<<n1<<k1<<endl;cout<<n2<<k2<<endl; cout<<n3<<k3<<endl;}
};
void main()
{
base baseobj;
d1 d1obj;
d2 d2obj;
baseobj.fun1();
d1obj.fun2();
d2obj.fun3();
}
修改后：
#include <iostream.h>
class base
{
private:
int n1;
protected:
int k1;
public:
base(){n1=0;k1=1;}
int get_n1(){return n1;}
void fun1(){cout<<"class base:"<<endl;
cout<<"n1="<<n1<<","<<"k1="<<k1<<endl;}

};

class d1:public base
{
private:
int n2;
protected:
int k2;
public:
d1(){n2=10;k2=11;}
int get_n2(){return n2;}
void fun2(){cout<<"class d1:"<<endl;
cout<<"n1="<<base::get_n1()<<","<<"k1="<<k1<<endl;
cout<<"n2="<<n2<<","<<"k2="<<k2<<endl;}

};

class d2:public d1
{
private:
int n3;
protected:
int k3;
public:
d2(){n3=20;k3=21;}
void fun3(){cout<<"class d2:"<<endl;
cout<<"n1="<<base::get_n1()<<","<<"k1="<<k1<<endl;
cout<<"n2="<<d1::get_n2()<<","<<"k2="<<k2<<endl;
cout<<"n3="<<n3<<","<<"k3="<<k3<<endl;}
};
void main()
{
base baseobj;
d1 d1obj;
d2 d2obj;
baseobj.fun1();
d1obj.fun2();
d2obj.fun3();
}

...全文