Сделать класс Монитор

#include < iostream>
#include < conio.h>
using namespace std;
 
class Monitor
{
int a;
public:
    diaganal = "22";
     massa = "5";
  def changediaganal(self,new diaganal):
          self.diaganal = new diaganal
     def changemassa(self,new massa):
          self.massa = new massa
}
obj1 = Second();
obj2 = Second();
 
void main ()
{
}

#include < iostream>
#include < conio.h>
 
using namespace std;
 
class Monitor
{
private:
int diagonal, mass;
public:
Monitor(){ this->diagonal = 0; this->mass = 0; }
Monitor(int diagonal, int mass){ this->diagonal = diagonal; this->mass = mass; }
~Monitor(){}
 
void setDiagonal(int nd){ diagonal = nd; }
void setMass(int nm){ mass = nm; }
 
int getDiagonal(){ return diagonal; }
int getMass(){ return mass; }
};
 
int main ()
{
return 0;
}