класс треугольник - C++ - Ответ 1226755

#ifndef rectangle__h
#define rectangle__h
 
#include <math.h>
#include <iostream>
#include <conio.h>
 
using namespace std;
 
class rectangle
{
private:
    double a, b,c;
public:
    rectangle();
    rectangle(const double&, const double&, const double&);
    const rectangle & operator= (const rectangle&);
    double square(void);
    double perimeter(void);
    void print_rectangle(void);
};
 
#endif

#include "rectangle.h"
 
rectangle::rectangle()
{
    cout << "The constructor \"rectangle()\" worked.\n";
    a = 1.0;
    b = 1.0;
    c = 1.0;
};
 
rectangle::rectangle(const double& x, const double& y, const double& z)
{
    cout << "The constructor \"rectangle(double, double, double)\" worked.\n";
    a = x;
    b = y;
    c = z;
};
 
const rectangle& rectangle::operator=(const rectangle& x)
{
    a = x.a;
    b = x.b;
    c = x.c;
    return *this;
};
 
double rectangle::square(void)
{
    double p = (a + b + c) / 2; 
    return sqrt(p * (p - a) * (p - c) * (p - b));
};
 
double rectangle::perimeter()
{
    return a + b + c;
};
 
 
void rectangle::print_rectangle()
{
    cout << "a = " << a << ", b = " << b << ", c = " << c << endl;
    cout << "P = " << perimeter() << ", S = " << square() << endl;
};

#include "rectangle.h"
 
void main()
{
    rectangle r1;
    double a, b, c;
    do
    {
        cout << "\n  Our rectangle:\n";
        r1.print_rectangle();
        cout << "Input a, b, c:\n";
        cin >> a>> b >> c;
        rectangle r2(a, b, c);
        cout << "\n Your rectangle:\n";
        r2.print_rectangle();
        r1 = r2;
        cout << "\n Your rectangle is our now:\n";
        r1.print_rectangle();
        cout << "Repeat or quit?(r/q)...";
    }
    while (_getch() != 'q');
    return;
};