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Source Code
main.cpp
#include "square.h"
int main(int argc, char** argv)
{
Square s1(4);
cout << "Square with length of " << s1.getLength();
cout << "\n\nperimeter = " << s1.getPerimeter();
cout << "\narea = " << s1.getArea() << "\n\n";
s1.display();
Square s2(3);
cout << "\nSquare with length of " << s2.getLength();
s2.setLength(5);
cout << "\nJust changed length to " << s2.getLength();
cout << "\n\nperimeter = " << s2.getPerimeter();
cout << "\narea = " << s2.getArea() << "\n\n";
s2.display();
return 0;
}
square.h
#ifndef SQUARE_H
#define SQUARE_H
#include <iostream>
using namespace std;
class Square
{
public:
Square(const double l = 5);
double getPerimeter();
double getArea();
void setLength(const double l);
double getLength();
void display();
private:
void validateLength();
double length;
};
#endif
square.cpp
#include "square.h"
using namespace std;
Square::Square(const double l)
{
length = l;
validateLength();
}
double Square::getPerimeter()
{
return length * 4;
}
double Square::getArea()
{
return length * length;
}
void Square::setLength(const double l)
{
length = l;
validateLength();
}
double Square::getLength()
{
return length;
}
void Square::display()
{
for (int x = 0; x < length; x++)
{
for (int y = 0; y < length; y++)
{
cout << "*";
}
cout << endl;
}
}
void Square::validateLength()
{
if (length < 0 || length > 100)
{
cout << "Error: length must be from 0 to 100\n";
exit(1);
}
}
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