-
Notifications
You must be signed in to change notification settings - Fork 1
/
Quadrilateral.h
69 lines (55 loc) · 2.48 KB
/
Quadrilateral.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
//******************************************************************************
// Quadrilateral.h
// Inheritance
//
// Created by Karlina Beringer on July 8, 2014.
//
// This header file contains the Quadrilateral class declaration.
// Quadrilateral is the base class for an inheritance chain.
// Quadrilateral includes Point through composition.
//******************************************************************************
#ifndef Quadrilateral_h
#define Quadrilateral_h
#include "Point.h"
//------------------------------------------------------------------------------
// Quadrilateral represents a four-sided polygon whose vertices can be
// circumscribed on a circle such that we get one area rather than two
// triangles touching each other at a single point.
//------------------------------------------------------------------------------
class Quadrilateral
{
protected:
// Points are accessible only by Quadrilateral and its descendents.
Point A, B, C, D;
// A brief description of the class.
const string TYPE = "QUADRILATERAL";
// Determines whether the quadrilateral is cyclic using
// Ptolemy's Theorem:
// If AB × CD + BC × DA = AC × BD,
// where AB, CD, BC, and DA are side lengths,
// Then the quadrilateral ABCD is cyclic.
bool isCyclicQuadrilateral();
public:
// Default constructor initializes all Points to default values.
Quadrilateral();
// Normal constructor assigns Points to the parameter values.
Quadrilateral( Point A, Point B, Point C, Point D );
// Copy constructor creates a clone of Quadrilateral object.
Quadrilateral( Quadrilateral & quadrilateral );
// Getter returns the perimeter of this Quadrilateral.
// Perimeter = sum of all side lengths.
double getPerimeter();
// Getter returns the area of this Quadrilateral.
double getArea();
// Print the contents of this Quadrilateral.
// If no ostream parameter is supplied, default will be cout.
void print( ostream & output = cout );
// Friend function behaves like Quadrilateral's print method.
// Overloads the ostream operator.
// Friend is NOT a member of this class, but has access to its members.
friend ostream & operator << ( ostream & output, Quadrilateral & quad );
};
#endif
//******************************************************************************
// End of File
//******************************************************************************