class 派生类名：public 基类名
{
};例子class CStudent
{
private:
string sName;
int nAge;
public:
bool IsThreeGood() { };
void SetName( const string & name )
{ sName = name; }
//......
};
class CUndergraduateStudent: public CStudent
{
private:
int nDepartment;
public:
bool IsThreeGood() { ...... }; //覆盖
bool CanBaoYan() { .... };
}; // 派生类的写法是：类名: public 基类名覆盖：派生类中的成员函数和基类中的完全一样，但行为可能需要不一样，所以在派生类中对函数的行为重新编写。这里感觉应该是隐藏，而不是覆盖，至于重载、覆盖、隐藏等的区别，后面有时间专门写个博客总结下。class CBase
{
int v1,v2;
};
class CDerived:public CBase
{
int v3;
};
#include <iostream>
#include <string>
using namespace std;
class CStudent
{
private:
string name;
string id; //学号
char gender; //性别,'F'代表女，'M'代表男
int age;
public:
void PrintInfo();
void SetInfo( const string & name_,const string & id_,int age_, char gender_ );
string GetName() { return name; }
};
class CUndergraduateStudent:public CStudent
{//本科生类，继承了CStudent类
private:
string department; //学生所属的系的名称
public:
void QualifiedForBaoyan() { //给予保研资格
cout << “qualified for baoyan” << endl;
}
void PrintInfo() {
CStudent::PrintInfo(); //调用基类的PrintInfo
cout << “Department:” << department <<endl;
}
void SetInfo( const string & name_,const string & id_,int age_,char gender_ ,const string & department_) {
CStudent::SetInfo(name_,id_,age_,gender_); //调用基类的SetInfo
department = department_;
}
};
void CStudent::PrintInfo()
{
cout << "Name:" << name << endl;
cout << "ID:" << id << endl;
cout << "Age:" << age << endl;
cout << "Gender:" << gender << endl;
}
void CStudent::SetInfo( const string & name_,const string & id_,int age_,char gender_ )
{
name = name_;
id = id_;
age = age_;
gender = gender_;
}
int main()
{
CUndergraduateStudent s2;
s2.SetInfo(“Harry Potter ”, “118829212”,19,‘M’,“Computer Science”);
cout << s2.GetName() << “ ” ;
s2.QualifiedForBaoyan ();
s2.PrintInfo ();
return 0;
}
输出结果：
Harry Potter qualified for baoyan
Name:Harry Potter
ID:118829212
Age:19
Gender:M
Department:Computer Science
像在派生类的PrintInfo函数中那样，先调用了基类里面的同名成员函数，完成跟基类有关的事。然后再写一些代码，完成跟派生有关的事。这种做法实际上是特别常见的。原文地址：http://blog.csdn.net/buxizhizhou530/article/details/45192097
