C++语言基础 例程 派生类的声明与构成

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派生类

#include <iostream>#include<string>
using namespace std;
class Student//声明基类Student
{
public:
    void sets(int n,string nam,char s);
    void show( );
protected:     //保护部分
    int num;
    string name;
    char sex ;
};
void Student::sets(int n,string nam,char s)
{
    num=n;
    name=nam;
    sex=s;
}
void Student::show( )
{
    cout<<"num: "<<num<<endl;
    cout<<"name: "<<name<<endl;
    cout<<"sex: "<<sex<<endl<<endl;
}
class Student1: public Student //声明派生类Student1
{
public:
    void sets1(int n,string nam,char s,int a,string ad);
    void show1( );
private:     //派生类的私有部分
    int age;
    string addr;
};
void Student1::sets1(int n,string nam,char s,int a,string ad)
{
    sets(n,nam,s);
    age=a;
    addr=ad;
}
void Student1::show1( )
{
    cout<<"num: "<<num<<endl;
    cout<<"name: "<<name<<endl;
    cout<<"sex: "<<sex<<endl;
    cout<<"age: "<<age<<endl;
    cout<<"address: "<<addr<<endl<<endl;
}

int main( )
{
    Student1 stud;
    stud.sets1(10010,"Wang",'f',19,"Shanghai");
    stud.show1( );         //输出第一个学生的数据
    stud.show();
    return 0;
}