/******************************************************************************
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#include "Header.h"
#include <stdio.h>
class Line : public LineLength<Line>
{
protected:
friend class LineLength<Line>;
float start, stop;
public:
Line(float start, float stop): start{start}, stop{stop} {}
};
int main()
{
Line line{1,3};
return line.Length();
}
#pragma once
template <typename T>
class LineLength
{
T const & Base() const { return *static_cast<T const *>(this); }
public:
float Length() const
{
return Base().stop - Base().start;
}
};
