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  • 自考新教材-p192

    源程序:

    #include<iostream>
    using namespace std;

    class BaseClass //基类
    {
    int v1, v2;
    public:
    void SetValue(int m, int n)
    {
    v1 = m;
    v2 = n;
    }
    void PrintValue();
    };

    void BaseClass::PrintValue()
    {
    cout << "v1=" << v1 << " v2=" << v2; //本类中,可以直接访问
    }

    class DerivedClass :public BaseClass //派生类
    {
    int v3; //私有成员变量
    public:
    void SetValue(int m, int n, int k)
    {
    BaseClass::SetValue(m, n); //通过基类的公有成员函数访问其私有成员变量
    v3 = k; //本类中,可以直接访问私有成员变量
    }
    void PrintValue();
    };

    void DerivedClass::PrintValue()
    {
    cout << endl;
    BaseClass::PrintValue();
    cout << " v3=" << v3 << endl; //直接访问本类中的私有成员变量
    }

    int main()
    {
    BaseClass baseCla;
    DerivedClass derivedCla;
    cout << "初始时的随机值:" << endl;
    baseCla.PrintValue();
    derivedCla.PrintValue();
    cout << "修改基类中的值后" << endl;
    baseCla.SetValue(10, 20);
    baseCla.PrintValue();
    derivedCla.PrintValue();
    cout << "从派生类修改从基类继承的值及本类的值:" << endl;
    derivedCla.SetValue(100, 200, 300);
    baseCla.PrintValue();
    derivedCla.PrintValue();
    system("pause");
    return 0;
    }

    运行结果:

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  • 原文地址:https://www.cnblogs.com/duanqibo/p/12259839.html
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