C++ 클래스를 이용한 성적처리(동적메모리)

#include <iostream>
#include <iomanip>
#include <string>
using namespace std;

class Name {
 string name;
public:
 Name() {

 }
 Name(string name) {
  this->name = name;
 }
 void setName(string name) {
  this->name = name;
 }
 string getName() {
  return name;
 }
};

class Subject {
 int score;
public :
 void setScore(int score) {
  this->score = score;
 }
 int getScore() {
  return score;
 }
};
//공통적인기능을 하기때문에 집어넣음

class ScoMag {
 Name name;
 Subject kor;
 Subject eng;
 Subject mat;
 int total;
 float avg;
 
public:
 void setName(string name) {
  this->name.setName(name);
 }
 void setKor(int score) {
  kor.setScore(score);
 }
 void setEng(int score) {
  eng.setScore(score);
 }
 void setMat(int score) {
  mat.setScore(score);
 }
 void setTotal(int total) {
  this->total = total;
 }
 void setAvg(float avg) {
  this->avg = avg;
 }
 string getName() {
  return name.getName();
 }
 int getKor() {
  return kor.getScore();
 }
 int getEng() {
  return eng.getScore();
 }
 int getMat() {
  return mat.getScore();
 }
 int getTotal() {
  total = kor.getScore() + eng.getScore() + mat.getScore();
  return total;
 }
 float getAvg() {
  return getTotal() / 3.f;
 }
};

void main() {
 int num=0;
 string name;
 int kor, eng, mat;

 cout << "몇 명할래" << endl;
 cin >> num;
 
 ScoMag *scomag = new ScoMag[num];

 for (int i = 0; i < num; i++) {

  cout << "이름을 입력하세요" << endl;
  cin >> name; //메인에있는 변수에 줘야하지
  scomag[i].setName(name); //그리고 호출하고 name을 줘야함
  cout << "국어성적을 입력하세요" << endl;
  cin >> kor;
  scomag[i].setKor(kor);
  cout << "영어성적을 입력하세요" << endl;
  cin >> eng;
  scomag[i].setEng(eng);
  cout << "수학성적을 입력하세요" << endl;
  cin >> mat;
  scomag[i].setMat(mat);

 }
 cout << setw(5) << "이름\t국어\t영어\t수학\t총점\t평균\t" << endl;
 for (int i = 0; i < num; i++) {
  cout << scomag[i].getName()<<"\t" << scomag[i].getKor() << "\t" << scomag[i].getEng()
  << "\t" << scomag[i].getMat() << "\t" << scomag[i].getTotal() << "\t" << scomag[i].getAvg() <<endl;
  
 }

}