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// Ex8_06.cpp
// Adding CBox objects
#include <iostream> // For stream I/O
#include <utility> // For operator overload templates
using std::cout;
using std::endl;
using namespace std::rel_ops;
class CBox // Class definition at global scope
{
public:
// Constructor definition
explicit CBox(double lv = 1.0, double wv = 1.0, double hv = 1.0) : m_Height(hv)
{
m_Length = std::max(lv, wv);
m_Width = std::min(lv, wv);
// Length is now greater than or equal to width
if(m_Height > m_Length)
{
m_Height = m_Length;
m_Length = hv;
// m_Height is still greater than m_Width so swap them
double temp = m_Width;
m_Width = m_Height;
m_Height = temp;
}
else if( m_Height > m_Width)
{
m_Height = m_Width;
m_Width = hv;
}
}
// Function to calculate the volume of a box
double Volume() const
{
return m_Length*m_Width*m_Height;
}
// Operator function for 'less than' that
// compares volumes of CBox objects.
bool operator<(const CBox& aBox) const
{
return this->Volume() < aBox.Volume();
}
// 'Less than' operator function to compare a CBox object volume with a constant
bool operator<(const double& value) const
{
return this->Volume() < value;
}
// 'Greater than' function to compare a CBox object volume with a constant
bool operator>(const double& value) const
{
return this->Volume() > value;
}
// Overloaded equality operator
bool operator==(const CBox& aBox) const
{
return this->Volume() == aBox.Volume();
}
// Function to add two CBox objects
CBox operator+(const CBox& aBox) const
{
// New object has larger length & width, and sum of heights
return CBox(m_Length > aBox.m_Length ? m_Length : aBox.m_Length,
m_Width > aBox.m_Width ? m_Width : aBox.m_Width,
m_Height + aBox.m_Height);
}
// Function to show the dimensions of a box
void ShowBox() const
{
cout << m_Length << " " << m_Width << " " << m_Height << endl;
}
private:
double m_Length; // Length of a box in inches
double m_Width; // Width of a box in inches
double m_Height; // Height of a box in inches
};
// Function comparing a constant with a CBox object
inline bool operator>(const double& value, const CBox& aBox)
{
return value > aBox.Volume();
}
int main()
{
CBox smallBox(4.0, 2.0, 1.0);
CBox mediumBox(10.0, 4.0, 2.0);
CBox aBox;
CBox bBox;
cout << "smallBox dimensions are ";
smallBox.ShowBox();
cout << "mediumBox dimensions are ";
mediumBox.ShowBox();
aBox = smallBox + mediumBox;
cout << "aBox = smallBox + mediumBox. Dimensions are ";
aBox.ShowBox();
bBox = aBox + smallBox + mediumBox;
cout << "bBox = aBox + smallBox + mediumBox. Dimensions are ";
bBox.ShowBox();
return 0;
}
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