写的一个C++简单类

主要学习下简单的构造函数构造：

#include <iostream>
using std::cout;
using std::cin;
using std::endl;

#include <string>
using std::string;
using std::getline;


class GradeBook
{
private:
	string courseName;
public:
	GradeBook():courseName(""){};
	GradeBook(string s):courseName(s){};
	void setName(string newName)
	{
       courseName = newName;
	}
	void displayMessage()//形参
	{
		cout << "Welcome to the grade book for " << courseName << "!" 
			<<endl;
	}
};


int main()
{
	string nameOfCourse;//创建string类型变量，用语存储输入课程名称
    
	cout << "Please enter the course name:" << endl;//提示输入课程名称
	getline(cin,nameOfCourse);//通过getline库函数执行输入，从用户那里读取名称赋值给nameOfCourse
	cout << endl;
	GradeBook myGradeBook1(nameOfCourse);
	myGradeBook1.displayMessage();

	GradeBook myGradeBook2();
	myGradeBook2.setName(nameOfCourse);
	myGradeBook2.displayMessage();
	return 0;

}