重学C++ 005分离接口与实现

//GradeBook.cpp
#include<iostream>
using std::cout;
using std::endl;

#include"GradeBook.h"


GradeBook::GradeBook(string courseName)
{
	setCourseName(courseName);
}

void GradeBook::displayMessage()
{
	cout<<"欢迎使用"<<getCourseName()<<"手册！"<<endl;
}

void GradeBook::setCourseName(string courseName)
{
	this->courseName=courseName;
}

string GradeBook::getCourseName()
{
	return this->courseName;
}

//GradeBook.h
#include<iostream>   
using std::cout;  
using std::endl;  
  
#include<string>   
using std::string;  
  
  
class GradeBook  
{  
public:  
    GradeBook(string courseName); 
    void displayMessage();  
    void setCourseName(string courseName); 
    string getCourseName();
private:  
    string courseName;  
};

main.cpp

//分离借口与实现
#include<iostream>
using std::cout;
using std::endl;

#include"GradeBook.h"

int main()
{
	GradeBook myGradeBook_1("C++ 编程基础");
	GradeBook myGradeBook_2("数据结构 算法");
	myGradeBook_1.displayMessage();
	myGradeBook_2.displayMessage();
	getchar();;
	return 0;
}

//创建类好处在于，提高复用性。写完一个类，可以供其他程序用。