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

class student
{
private:
 int num;

public:
 student(int n)
 {
  num = n;
 }
 student()
 {}
 int Gnum()
 {
  return num;
 }
};

class Lscore: virtual public student
{
private:
 int kor;
 int eng;
 
public:
 Lscore(int n, int k, int e) : student(n)
 {
  kor = k;
  eng = e;
 }
 int Gkor()
 {
  return kor;
 }
 int Geng()
 {
  return eng;
 }

};

class Nscore : virtual public student
{
private:
 int math;
 int sci;
 
public:
 Nscore(int n, int m, int s) : student(n)
 {
  math = m;
  sci = s;
 }
 int Gmath()
 {
  return math;
 }
 int Gsci()
 {
  return sci;
 }
};

class Totscore : public Lscore, public Nscore
{
private:
 int tot;
 float avg;

public:
 Totscore(int n, int k, int e, int m, int s, int t, float a) : Lscore(n,k,e), Nscore(n,m,s)
 {
  tot = t;
  avg = a;
  
 }
 void settot();
 void setavg();

 int Gtot()
 {
  return tot;
 }
 float Gavg()
 {
  return avg;
 }

};

void Totscore::settot()
{
 tot = Gkor() + Geng() + Gmath() + Gsci();
}

void Totscore::setavg()
{
 avg = (float)tot/4;
}

const int CNT =5;

void main()
{
 int i=0;
 Totscore Hak[CNT] = { Totscore(101, 85, 90, 80, 77, 0, 0.0), Totscore(102, 90, 95, 89, 85, 0, 0.0)
     , Totscore(103, 80, 70, 70, 55, 0, 0.0), Totscore(104, 75, 80, 90, 85, 0, 0.0)
     , Totscore(105, 85, 90, 85, 85, 0, 0.0)};

 for(i=0; i<CNT; i++)
 {
  Hak[i].setavg();
  Hak[i].settot();
 }

 cout<< Hak[0].Gavg() << endl;
 
}

여기서 마지막 평균값 출력하는데 값이 0으로 나옵니다.
평균구하는 함수는 문제 없는듯한데 어디서 잘못된걸까요?