The overloaded 'less-than' operators with double value : overload logic operator « Operator Overloading « C++ Tutorial

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C++ Tutorial » Operator Overloading » overload logic operator 
10.4.1.The overloaded 'less-than' operators with double value
#include <iostream>
#include <cstdlib>               // For random number generator
#include <ctime>                 // For time function
using std::cout;
using std::endl;

class Box {
  public:
    Box(double aLength, double aWidth, double aHeight):length(aLength), width(a
Width), height(aHeight) {}

    double volume() const {
      return length*width*height;
    }

    double getLength()  const return length; }
    double getWidth() const return width; }
    double getHeight()  const return height; }

    inline bool operator<(const Box& aBoxconst {
      return volume() < aBox.volume();
    }

    inline bool operator<(const double aValueconst {
      return volume() < aValue;
    }


  private:
    double length;
    double width;
    double height;
};


int main() {


  Box firstBox(17.011.05.0);

  if(firstBox < 100000){
    cout << "less than";
  }else{
    cout << "not less than";
  }

  return 0;
}
less than
10.4.overload logic operator
10.4.1.The overloaded 'less-than' operators with double value
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