Shape

#include <iostream>
#include <cmath>
using namespace std;


//TODO: konstruiraj ja abstraknata klasa Shape
class Shape{
protected:
    int strana;
public:
    Shape(){
        this->strana=0;
    }
    Shape(int strana){
        this->strana=strana;
    }
    virtual double plostina() = 0;
    virtual void pecati() = 0;
    virtual int getType() = 0;
};

//TODO: konstruiraj ja klasata Kvadrat
class Square:public Shape{
    public:
        Square():Shape(){}
        Square(int strana):Shape(strana){}
        double plostina(){
            return strana*strana;
        }
        void pecati(){
            cout<<"Kvadrat so plostina = "<<plostina()<<endl;
        }
        int getType(){
            return 1;
        }
};
//TODO: konstruiraj ja klasata Krug
class Circle:public Shape{
public:
    Circle():Shape(){}
    Circle(int strana):Shape(strana){}
    double plostina(){
        return 3.14*strana*strana;
    }
    void pecati(){
        cout<<"Krug so plostina = "<<plostina()<<endl;
    }
    int getType(){
        return 2;
    }
};
//TODO: konstruiraj ja klasata Triagolnik
class Triangle:public Shape{
public:
    Triangle():Shape(){}
    Triangle(int strana):Shape(strana){}
    double plostina(){
        return (sqrt(3)/4) * strana * strana;
    }
    void pecati(){
        cout<<"Triagolnik so plostina = "<<plostina()<<endl;
    }
    int getType(){
        return 3;
    }
};

//TODO: definiraj go metodot void checkNumTypes(Shape** niza, int n)
void checkNumTypes(Shape** niza, int n){
    int s,c,t;
    s=c=t=0;
    for(int i=0;i<n;i++){
        if((niza[i]->getType())==1){
            s++;
        }
        else if((niza[i]->getType())==2){
            c++;
        }
        else if((niza[i]->getType())==3){
            t++;
        }
    }
    cout<<"Broj na kvadrati vo nizata = "<<s<<endl;
    cout<<"Broj na krugovi vo nizata = "<<c<<endl;
    cout<<"Broj na triagolnici vo nizata = "<<t<<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*[n];

	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);
        }
        else if(classType==2){
            niza[i]=new Circle (side);
        }
        else if(classType==3){
            niza[i]=new Triangle (side);
        }
	}


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

		niza[i]->pecati();
	}

	checkNumTypes(niza, n);


	return 0;
}