The point of the program I am making is to have a pure abstract base class called BasicShape and have 2 child classes, Circle and Rectangle. I have the program written but with one unresolved error.
Main.cpp file
#include "Pure.h"
#include <iostream>
using namespace std;
int main() {
Circle pizza(2,2,10);
Rectangle box(10,5);
cout << "The Circle's information: " << endl;
cout << "Center x = " << pizza.getCenterX() << endl;
cout << "Center y = " << pizza.getCenterY() << endl;
cout << "Area = " << pizza.getArea() << endl << endl << endl;
cout << "The Rectangle's information: " << endl;
cout << "Length = " << box.getLength() << endl;
cout << "Width = " << box.getWidth() << endl;
cout << "Area = " << box.getArea() << endl;
}.H file
#ifndef PURE_H
#define PURE_H
class BasicShape {
protected:
double area;
public:
double getArea() const;
virtual void calcArea() ; //used to make BasicShape a pure abstract base class
};
class Circle : public BasicShape {
private:
long centerX;
long centerY;
double radius;
public:
//constructor
Circle(long, long, double);
//accessors
long getCenterX() const;
long getCenterY() const;
//mutator
virtual void calcArea() ;
};
class Rectangle : public BasicShape {
private:
long width;
long length;
public:
//constructor
Rectangle(long,long);
//accessors
long getWidth() const;
long getLength() const;
//mutator
virtual void calcArea() ;
};
#endif.cpp file
#include "Pure.h"
double BasicShape :: getArea() const {
return area;
}
Circle::Circle(long x, long y,double r) {
centerX = x;
centerY = y;
radius = r;
calcArea();
}
long Circle::getCenterX() const {
return centerX;
}
long Circle::getCenterY() const {
return centerY;
}
void Circle::calcArea() {
area = 3.14159 * radius * radius;
}
Rectangle::Rectangle(long L, long W) {
length = L;
width = W;
calcArea();
}
long Rectangle::getWidth() const {
return width;
}
long Rectangle::getLength() const {
return length;
}
void Rectangle::calcArea() {
area = length * width;
}The error I get is this: Error 1 error LNK2001: unresolved external symbol "public: virtual void __thiscall BasicShape::calcArea(void)" (?calcArea@BasicShape@@UAEXXZ)
Any help will be much appreciated. Thanks in advance.