Homework project(need help)
Hello everyone. Here is my problem.I am given four classes (Point,Shape,Circle,Rectangle)
and I must complete theme so as the program works.
Here is my project:
Code:
//shapes.h
#ifndef shapes_h
#define shapes_h
1 class Point{
private:
int x;
int y;
public:
Point();
Point(int k, int l);
~Point();
void setX(int );
int getX() const;
void setY(int );
int getY() const;
void print() const;
Point & operator=(const Point &p1);
};
//Abstract class
2 class Shape {
public:
//.....
virtual double Area() =0;
virtual double Perifereia() =0;
virtual void print() const = 0;
};
3 class Rectangle : public Shape {
private:
Point *myUpperLeft;
Point *myLowerRight;
public:
double Area();
void print() const;
double Perifereia();
int GetWidth() const;
int GetHeight() const;
Rectangle(Point *pUL, Point *pLR);
};
4 class Circle : public Shape, public Point
{
public:
// .......
private:
double radius;
virtual double Area() =0;
};
#endif
shapes.cpp
Code:
#include <iostream>
#include <cmath>
using namespace std;
#include "shapes.h"
//Class Point Functions
Point::Point(int k,int l )
{x=k;y=l;}
Point::Point ()
{x=y=0;}
Point::~Point()
{}
void Point::setX(int xValue) {x=xValue;}
int Point::getX() const{return x;}
void Point::setY(int yValue) {y=yValue;}
int Point::getY() const{return y;}
void Point::print()const{cout<<"["<<x<<","<<y<<"]"<<endl;}
Point & Point::operator=(const Point &p1)
{
if(this !=&p1)
{
x=p1.x;
y=p1.y;
}
return *this;
}
//Class Rectangle functions
int Rectangle::GetWidth()const{return myUpperLeft->getX()-myLowerRight->getX();} /*line1*/
Rectangle::Rectangle(Point *pUL, Point *pLR) //error here /*line2*/
{
myUpperLeft=pUL;
myLowerRight=pLR;
};
and main.cpp has nothing special.
I use Dev-C++ and the error message is
"[Linker error] undefined reference to 'vtable for Rectangle'"
