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2.0 KiB
2.0 KiB
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
- improve documentation
- extend unit tests
- experiment with bigger nominator/denominator using all of 32767 possibilities ?
- investigate divide by zero errors
- investigate better fractionize() - depends on nom/denom size
- test test test ...
- add famous constants as Fraction e.g FRAC_PI = (355, 113) ??