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#include <iostream>
#include <cmath>
using namespace std;
class Point
{
private:
double px;
double py;
public:
void setX(const double x);
void setY(const double y);
double getX() const;
double getY() const;
};
class Triangle
{
private:
Point blPoint;
double length, height;
public:
// member functions
void setBottomLeftX(const double x);
void setBottomLeftY(const double y);
void setLength(const double inLength);
void setHeight(const double inHeight);
Point getBottomLeft() const;
Point getBottomRight() const;
Point getTopLeft() const;
double getLength() const;
double getHeight() const;
double perimeter() const;
double hypotenuse() const;
void scaleLength(const double sx);
void scaleHeight(const double sy);
void display() const;
};
// FUNCTION PROTOTYPES GO HERE:
void read_triangle(Triangle & tri);
int main()
{
// Define local variables
Triangle tri;
double sx, sy;
//Prompt the user for triangle information and fill Class Triangle object, tri,
//with this information
read_triangle(tri);
// Display triangle information
tri.display();
// Prompt and read scale factors to change length and height
cout << "Enter scale factor in x direction: ";
cin >> sx;
cout << "Enter scale factor in y direction: ";
cin >> sy;
// Apply scale factors
tri.scaleLength(sx);
tri.scaleHeight(sy);
// Display triangle information
tri.display();
return 0;
}
// FUNCTION DEFINITIONS GO HERE:
// CLASS MEMBER FUNCTION DEFINITINOS GO HERE:
void Point::setX(const double x)
{
px = x;
}
void Point::setY(const double y)
{
py = y;
}
double Point::getX() const
{
return (px);
}
double Point::getY() const
{
return (py);
}
void Triangle::setBottomLeftX(const double x)
{
blPoint.setX(x);
}
void Triangle::setBottomLeftY(const double y)
{
blPoint.setY(y);
}
void Triangle::setLength(const double inLength)
{
length = inLength;
}
void Triangle::setHeight(const double inHeight)
{
height = inHeight;
}
Point Triangle::getBottomLeft() const
{
return blPoint;
}
Point Triangle::getBottomRight() const
{
double mx = (blPoint.getX() + height);
getBottomRight().setX(mx);
return getBottomRight();
}
Point Triangle::getTopLeft() const
{
double my = (blPoint.getY() + height);
getTopLeft().setY(my);
return getTopLeft();
}
double Triangle::getLength() const
{
return length;
}
double Triangle::getHeight() const
{
return height;
}
double Triangle::hypotenuse() const
{
return sqrt((length * length) + (height * height));
}
double Triangle::perimeter() const
{
return ((sqrt(length * length) + (height * height)) + length + height);
}
void Triangle::scaleLength(const double scalefact)
{
length *= scalefact;
}
void Triangle::scaleHeight(const double scalefact)
{
height *= scalefact;
}
void Triangle::display() const
{
cout << "----------------------------------------" << endl;
cout << "Lower Left Vertex (" << blPoint.getX() << ", " << blPoint.getY() << ")" << endl;
cout << "Top Left Vertex (" << blPoint.getX() << ", " << getTopLeft().getY() << ")" << endl;
cout << "Bottom Right Vertex (" << getBottomRight().getX() << ", " << blPoint.getY() << ")" << endl;
cout << "Dimensions (" << getBottomRight().getX() - blPoint.getX() << ", " << getTopLeft().getY() - blPoint.getY() << ")" << endl;
cout << "Hypotenuse = " << hypotenuse() << endl;
cout << "Perimeter = " << perimeter() << endl;
}
void read_triangle(Triangle & tri) // reads in coordinates of a triangle as well as its length and height, Triangle tri is class containing information about the triangle
{
double x, y, inLength, inHeight;
cout << "Enter bottom left x coordinates: ";
cin >> x;
tri.setBottomLeftX(x);
cout << "Enter bottom left y coordinates: ";
cin >> y;
tri.setBottomLeftY(y);
cout << "Enter length: ";
cin >> inLength;
tri.setLength(inLength);
cout << "Enter height: ";
cin >> inHeight;
tri.setHeight(inHeight);
}
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