Converts a simple mathematical expression to a continued fraction sequence
- a C++ compiler which supports C++11
- the GNU Multiple Precision Arithmetic Library
- the rational C++ template class
-
to evaluate an expression:
echo "2 + 0.8031975" | expr2cf=>[2, 1, 4, 12, 3, 4, 2, 1, 1, 1, 1, 2, 1, 1, 5] -
to get an approximated fraction of pi (from 18 decimal digits):
echo "scale=18; 4*a(1)" | BC_LINE_LENGTH=0 bc -l | expr2cf | cf2expr=>14308127635/4554418479 -
to get an approximated fraction of the golden ratio (Phi):
echo "[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]" | cf2expr=>6765/4181