Poo lab 4

#pragma warning(disable:4996)
#include <stdio.h>
#include <conio.h>
#include <iostream>
#include <math.h>

using namespace std;

class Punct;


class PoligonConvex {
    Punct *varfuri;
    int n;
public:
    PoligonConvex(int n, Punct v[]);
    double getPerimetru();
    ~PoligonConvex();
    void afiseaza();
};

class Punct {
private:
    double x, y;
public:
    Punct(double x = 0, double y = 0);
    friend void PoligonConvex::afiseaza();
    friend double lungime(Punct A, Punct B);
};


Punct::Punct(double x, double y) {
    this->x = x;
    this->y = y;
}


double lungime(Punct A, Punct B) {
    return sqrt(pow(int(B.x) - int(A.x), 2) + pow(int(B.y) - int(A.y), 2));
}

double PoligonConvex::getPerimetru() {
    double p = 0;
    int i;
    for ( i = 0;i < n - 1;i++) {
        p += lungime(varfuri[i], varfuri[i + 1]);
    }
    p += lungime(varfuri[i-1], varfuri[0]);
    return p;
}

PoligonConvex::PoligonConvex(int n, Punct v[]) {
    this->n = n;
    varfuri = new Punct[n];
    for (int i = 0;i<n;i++) {
        varfuri[i] = v[i];
    }
}

PoligonConvex::~PoligonConvex() {
    delete[] varfuri;
}
void PoligonConvex::afiseaza() {
    cout << "[";
    for (int i = 0;i<n;i++) {
        cout << "(" << varfuri[i].x << "," << varfuri[i].y << ")";
    }
    cout << "]";
}


void main() {
    Punct t[3] = { Punct(0,0), Punct(3,0),Punct(3,4) };
    PoligonConvex p(3, t);
double aux=p.getPerimetru();
    p.afiseaza();
    cout << aux;



    _getch();
}