程序代码：

#include<iostream>
#include<string>
using namespace std;
class Student                                    //声明基类 Student
{
public:
    Student( int n,string nam,char s)            //基类构造函数
    {
        num = n;
        name = nam;
        sex = s;}
    ~Student( ){ }                               //基类析构函数
protected:                                       //保护部分
    int num;
    string name;
    char sex;
};

class Student1:public Student                    //声明公用派生类 Student1
{
public:                                          //派生类的公用部分
    Student1( int n, string nam, char s, int a, string ad):Student( n,nam,s)           //派生类构造函数
    {
        age = a;                                 //在函数体中只对派生类新增的数据成员初始化
        addr = ad;
    }
    void show( )
    {
        cout << "num:" << num << endl;
        cout << "name:" << name << endl;
        cout << "sex:" << sex << endl;
        cout << "age:" << age << endl;
        cout << "address:" << addr << endl <<endl;
    }
    ~Student1( ){ }                                //派生类的析构函数
private:                                           //派生类的私有部分
    int age;
    string addr;
};
int main( )
{
    Student1 stud1( 10010,"Wang - li",'f',19,"115 Beijing Road, Shanghai");
    Student1 stud2( 10011,"Zhang - fun",'m',21,"213 Shanghai Road, Beijing");
    stud1.show( );                                //输出第一个学生的数据
    stud2.show( );                                //输出第二个学生的数据
    system("pause");
    return 0;
}
/*
派生类构造函数的一般形式为
派生类构造函数名(总参数表列):基类构造函数名(参数表列)
{派生类中新增成员初始化语句}
*/