C언어 df

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
/*
class Rectangle
{
private:
 int garo, sero, area;
public:
 Rectangle(int g, int s){garo=g; sero=s; area=garo*sero;}
 int getGaro(){return garo;}
 int getSero(){return sero;}
 int getArea(){return area;}
};

int main()
{
int garo; int sero; int area;
cout<< "가로: "; cin>>garo; 
cout<< "세로: "; cin>>sero; 
Rectangle rec(garo, sero);
cout<<"가로 : "<<rec.getGaro()<<",세로 : "<<rec.getSero()<<
", 넓이 :"<<rec.getArea()<<"n"<<endl;
}

int main()
{
 Rectangle rec(4, 6);
 ofstream rout;
 rout.open("c:\rectangle.txt");
 rout<<"가로 :" <<rec.getGaro()<<", 세로 : "<<rec.getSero()<<", 넓이 :"
  <<rec.getArea()<<endl;
 rout.close();
}
*/
class Student
{
private:
 string name; int mid, final; float avg;
 string std[3]; int std[3];
public:
 Student(string n, int m, int f)
 {name=n; mid=m; final=f;}
 Student(){name=""; mid=0; final=0;}
 string getName(){return name;}
 int getMid(){return mid;}
 int getFinal(){return final;}
 float getAvg(){return avg;}
 void calcAvg(){avg=(mid + final)/2.0;}
 void setStudent(string n, int m, int f){std[3];}
};
/*
int main()
{
 string name; int mid; int final; float avg;
 cout<<"이름 :"; cin>>name;
 cout<<"중간고사 :"; cin>>mid;
 cout<<"기말고사 :"; cin>>final;

 Student st(name, mid, final);
 st.calcAvg();
 cout<<"이름 :"<<st.getName()<<", 중간 :"<<st.getMid()<<
 ", 기말  :"<<st.getFinal()<<", 성적 :"<<st.getAvg()<< endl;

}
*/
int main()
{
 string name; int mid; int final; float avg;
 Student st();
 for (int i=0;i<3;i++)
 {
  cin>>std[i];
  cout<<"이름 : "<<st.getName"n"<<"중간고사 :"<<st.getMid"n"<<"기말고사 :"<<st.getFinal;
 }
}