맨토링 모임을 하려고 예제를 짜는데..

머리가 굳어서 인가.. 예제가 이따구 밖에 안나오네..

어떻게 쉽게 하려고 해도 똥망진창이 되어가는 코드..
주석도 붙이려다가.. 결국은 안붙이게 되고..

#pragma once

#include <string>

using namespace std;

class Human
{
    private:
        string  name;
        string  gender;
        int     age;

    public:
        Human( string aName, int aAge, string gender ); // Constructor
        ~Human( void );                                 // Destroyer

        string getName( );                              // getting a Name
        int    getAge( );                               // getting a Age
        string getGender( );                            // getting a Gender

        bool setName( string aName );                   // change to Name
        void growOld( );                                // get on in years

        void printName( );                              // print to Name
        void printAge( );                               // print to Age
};

#include <iostream>
#include "Human.h"

// 생성자
Human::Human( string aName, int aAge, string gender )
{
    this->name  = aName;
    this->age   = aAge;
    this->gender = gender;
}

// 파괴자
Human::~Human( void )
{
}

bool Human::setName( string aName )
{
   if( aName.size() > 3 ) 
   {
       cout << "이름은 2~3자만 가능합니다." << endl;
       return false;
   }
   this->name = aName;
   std::cout << "이름을 " << aName << "로 바꾸었습니다." << std::endl;
   return true;
}

void Human::growOld( )
{
    std::cout << "나이를 한살 더 먹었습니다. " << std::endl;
    this->age++;
}

void Human::printName( )
{
    std::cout << "Name : " << this->name << std::endl;
}

void Human::printAge( )
{
    std::cout << "Age : " << this->age << std::endl;
}

string Human::getName( )
{
    return this->name;
}

int Human::getAge( )
{
    return this->age;
}

string Human::getGender( )
{
    return this->gender;
}

#pragma once

#include <iostream>
#include <string>
#include "Human.h"

using namespace std;

class Student : private Human
{
public:
    Student( string name, int age, string gender, string num, int grade, string major );
    ~Student( void );

    int     getStGrade( void );
    string  getStNumber( void );
    string  getStMajor( void );

    void    nextGrade( void );
    void    changeMajor( string major );

    void    printStudentInfo( void );

private:
    int     stGrade;
    string  stNum;
    string  stMajor;
};

#include "Student.h"


Student::Student( string name, int age, string gender, string num, int grade, string major ) : Human(name, age, gender)
{
    this->stNum = num;
    this->stGrade = grade;
    this->stMajor = major;
}


Student::~Student(void)
{
}

string Student::getStNumber( void )
{
    return this->stNum;
}

int Student::getStGrade( void )
{
    return this->stGrade;
}

string Student::getStMajor( void )
{
    return this->stMajor;
}

void Student::nextGrade( void )
{
    if( this->stGrade >= 4 ) cout << this->getName() << "님은 졸업합니다" << endl;
    else cout << ++this->stGrade << "학년으로 진급하였습니다." << endl;
}

void Student::changeMajor( string major )
{
    this->stMajor = major;
    cout << major << "로 전과하였습니다." << endl;
}

void Student::printStudentInfo( void )
{
    cout << "* 이름 : " << this->getName()    << endl;
    cout << "* 나이 : " << this->getAge()     << endl;
    cout << "* 성별 : " << this->getGender()  << endl;
    cout << "* 학번 : " << this->stNum        << endl;
    cout << "* 학과 : " << this->stMajor      << endl;
    cout << "* 학년 : " << this->stGrade      << endl;
}

#include <iostream>
#include <string&>

#include "Human.h"
#include "Student.h"

using namespace std;

#define pause() getc(stdin)

int main(void)
{
    Human me(string("최건호"), 26, string("male"));

    cout << "My names is " << me.getName() << endl;
    cout << "My age is " << me.getAge() << endl;
    cout << "My Gender is " << me.getGender() << endl;
    me.setName(string("최모군"));
    me.growOld();

    me.printName();
    me.printAge();

    cout <<  "다음 으로 진행하시려면 Enter을 눌러주세요";
    pause();

    Student students( string("최건호"), 26, string("male"), string("200311703"), 4, string("컴퓨터공학과"));
/*
    cout << "My names is " << students.getName() << endl;
    cout << "My age is " << students.getAge() << endl;
    cout << "My Gender is " << students.getGender() << endl;

    students.setName("잘생김");
    students.growOld();
*/

    students.printStudentInfo( );
    students.nextGrade();
    students.changeMajor(string("철학과"));

    students.printStudentInfo( );
    pause();
    return 0;
}