Fraction

Arduino library to implement a Fraction data type (experimental).

Description

The fraction library implements fractional numbers a.k.a. Q, (integers are Z and floats/doubles are R), and the conversion to floats.

The code is working with a number of limitations among others:

denominator is max 4 digits to keep code for multiply and divide simple
Fractions are not exact (even floats are not exact)
the range of numbers supported is limited.
code is experimental still.

That said, the library is useful e.g. to display float numbers as a fraction. From programming point of view the fractionize() function, converting a double into a fraction is a nice programming problem, fast with a minimal error.

In short, use fractions with care otherwise your sketch might get broken ;)

Operations

See examples

Use with care

The library is reasonably tested, and if problems arise please let me know.

Future

must

improve documentation
test test test ...

should

investigate divide by zero errors
investigate better fractionize() - depends on nom/denom size

could

extend unit tests
experiment with bigger nominator/denominator using all of 32767 possibilities ?
add famous constants as Fraction e.g FRAC_PI = (355, 113) ??

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