C++ 需要帮助理解C++;班级
我已经完成了哈佛CS50课程,并与python进行了相当多的合作。我现在正在做一个C++课程(微软的),学习练习让我创建了几个类。这个练习特别要求我在main中实例化几个对象并返回一些值C++ 需要帮助理解C++;班级,c++,class,object,inheritance,syntax,C++,Class,Object,Inheritance,Syntax,我已经完成了哈佛CS50课程,并与python进行了相当多的合作。我现在正在做一个C++课程(微软的),学习练习让我创建了几个类。这个练习特别要求我在main中实例化几个对象并返回一些值 #include <iostream> #include "School.h" int main() { Student student1("Joe", "Bloggs", 31, "123 Fake Street", "London"); Student student2("Fr
#include <iostream>
#include "School.h"
int main()
{
Student student1("Joe", "Bloggs", 31, "123 Fake Street", "London");
Student student2("Fred", "Adams", 24, "95 Something Avenue", "Manchester");
Student student3("John", "Doe", 90, "44a Old Man Lane", "Kettering");
Course course1("Introduction to Psychology");
course1.addStudent(student1);
course1.addStudent(student2);
course1.addStudent(student3);
Teacher teacher1("Helen", "Professorson", 48, "15 Teacher Way", "Kent");
course1.addTeacher(teacher1);
std::cout << course1.getCourseName() << std::endl;
teacher1.GradeStudent();
}
#包括
#包括“School.h”
int main()
{
学生1(“乔”,“布洛格斯”,31,“假街123号”,“伦敦”);
学生2(“弗雷德”、“亚当斯”、24、“曼彻斯特大道95号”);
学生3(“约翰”、“多伊”、90、“44a老人巷”、“凯特林”);
课程1(“心理学导论”);
课程1.添加学生(学生1);
课程1.增加学生(学生2);
课程1.增加学生(学生3);
教师1(“海伦”,“教授”,48,“15教师之路”,“肯特”);
课程1.增加教师(教师1);
谢谢,我基本上都明白了
我需要在Student
和Teacher
中使用与Person
类相同的输入变量创建构造函数,然后在Student
构造函数中调用Person
构造函数:
您不需要在构造函数中指定数组大小:
头文件如下所示:
构造函数如下所示:
Course::Course()
: _students{ 0 }, _teacher{ 0 }, _name{}
{
}
将每个数组项初始化为0
还是不太确定
听起来您可以使用~Person();
+空实现,应该是~Person()=default;
而不使用用户定义的实现。空的用户定义析构函数与编译器生成的析构函数不同。您的代码是次优的(析构函数不是“”)。
#include "School.h"
#include <iostream>
#include <string>
// Constructors
Person::Person()
{
std::string _fName{};
std::string _lName{};
int _age{};
std::string _address{};
std::string _city{};
std::string _phone{};
}
Person::Person(std::string fName, std::string lName)
{
std::string _fName{ fName };
std::string _lName{ lName };
int _age{};
std::string _address{};
std::string _city{};
std::string _phone{};
}
Person::Person(std::string fName, std::string lName, int age, std::string address, std::string city, std::string phone)
{
std::string _fName{ fName };
std::string _lName{ lName };
int _age{ age };
std::string _address{ address };
std::string _city{ city };
std::string _phone{ phone };
}
// Destructor
Person::~Person()
{
}
std::string Person::getFirstName()
{
return this->_fName;
}
void Person::setFirstName(std::string fName)
{
this->_fName = fName;
}
std::string Person::getLastName()
{
return this->_lName;
}
void Person::setLastName(std::string lName)
{
this->_lName = lName;
}
int Person::getAge()
{
return this->_age;
}
void Person::setAge(int age)
{
this->_age = age;
}
std::string Person::getAddress()
{
return this->_address;
}
void Person::setAddress(std::string address)
{
this->_address = address;
}
std::string Person::getCity()
{
return this->_city;
}
void Person::setCity(std::string city)
{
this->_city = city;
}
std::string Person::getPhone()
{
return this->_phone;
}
void Person::setPhone(std::string phone)
{
this->_phone = phone;
}
void Student::SitInClass()
{
std::cout << "Sitting in main theater" << std::endl;
}
void Teacher::SitInClass()
{
std::cout << "Sitting at front of class" << std::endl;
}
void Teacher::GradeStudent()
{
std::cout << "Student Graded" << std::endl;
}
Course::Course()
{
Student* _students;
Teacher* _teacher;
std::string _name{};
}
Course::Course(std::string name)
{
Student* _students[30];
Teacher* _teacher;
std::string _name{ name };
}
Course::~Course()
{
}
void Course::addStudent(Student student)
{
// TODO: Loop through _students and insert new student in
}
void Course::addTeacher(Teacher teacher)
{
this->_teacher = &teacher;
}
std::string Course::getCourseName()
{
return this->_name;
}
void Course::setCourseName(std::string name)
{
this->_name = name;
}
Student::Student()
{
}
Student::Student(std::string fName, std::string lName)
: Person(fName, lName)
{
}
Student::Student(std::string fName, std::string lName, int age, std::string address, std::string city, std::string phone)
: Person(fName, lName, age, address, city, phone)
{
}
class Course
{
...
private:
// Member variables
std::string _name;
Student* _students[30];
Teacher* _teacher;
};
Course::Course()
: _students{ 0 }, _teacher{ 0 }, _name{}
{
}