写的一个C++简单类

主要学习下简单的构造函数构造：

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#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;

 

}