Shapes

#include <iostream>
#include <cstring>
#include <math.h>
using namespace std;
class Shape{
protected:
    int strana;
public:
    Shape(){
    strana=0;
    }
    Shape(int strana1){
     strana=strana1;
    }
    virtual double plostina()=0;
    virtual void pecati()=0;
    virtual int getType()=0;
};

class Square:public Shape{
 public:
     Square(){
     }
     Square(int strana1):Shape(strana1){
     }
   double plostina(){
    return strana*strana;
   }

   void pecati(){
    cout<<"Square so strana "<<strana<<" i polostina: "<<plostina()<<endl;
   }
   int getType(){
   return 1;
   }
};

class Circle:public Shape{
 public:
     Circle(){
     }
     Circle(int strana1):Shape(strana1){

     }
 double plostina(){
    return 3.14*strana*strana;
   }


   void pecati(){
    cout<<"Circle so strana "<<strana<<" i polostina: "<<plostina()<<endl;
   }

    int getType(){
   return 2;
   }
};

class Triangle:public Shape{
 public:
     Triangle(){
     }
     Triangle(int strana1):Shape(strana1){

     }
 double plostina(){
    return (sqrt(3)/4)*strana*strana;
   }

    void pecati(){
    cout<<"Triangle so strana "<<strana<<" i polostina: "<<plostina()<<endl;
   }

    int getType(){
   return 3;
   }
};
void checkNumTypes(Shape **niza,int n){
int brojacSquare=0;
int brojacCircle=0;
int brojacTriangle=0;
for(int i=0;i<n;i++){
    if(dynamic_cast<Square*>(niza[i])!=0){
        brojacSquare++;
    }else if(dynamic_cast<Circle*>(niza[i])!=0){
      brojacCircle++;
    }else if(dynamic_cast<Triangle*>(niza[i])!=0){
     brojacTriangle++;
    }
}

cout<<"Kvadrati: "<<brojacSquare<<endl;
cout<<"Krugovi: "<<brojacCircle<<endl;
cout<<"Triagolnici: "<<brojacTriangle<<endl;
}

int main(){


    int n;
    cin >> n;

    //TODO: inicijaliziraj niza od pokazuvachi kon klasata Shape
    Shape **niza;


    //TODO: alociraj memorija so golemina n za prethodno navedenata niza
    niza=new Shape*[50];

    int classType;
    int side;

    //TODO: konstruiraj for ciklus so chija pomosh ke ja popolnish nizata
    for(int i = 0; i < n; ++i){

        cin >> classType;
        cin >> side;
        if(classType==1)
        niza[i]=new Square(side);
        if(classType==2)
           niza[i]=new Circle(side);
        if(classType==3)
            niza[i]=new Triangle(side);
    }

for(int i = 0; i < n; ++i){

        niza[i]->pecati();
    }

    checkNumTypes(niza, n);

    return 0;
}