turingmachine

Documentation

Overview

Package turingmachine implements postfix calculator using a faster Turing machine.

Index

• func RPNTuringMachine(RPNInput string) float64

Examples

• RPNTuringMachine
• RPNTuringMachine (Exp)

Functions

func RPNTuringMachine

func RPNTuringMachine(RPNInput string) float64

RPNTuringMachine returns the result of a string in reverse polish notation (postfix) by using a turing machine. The original band in the words exploded in a slice and results are hold on the band but in num form. The turing band has two copies one in string and one in float. This is mandatory to avoid multiple conversions.

A processed operation or value is erased using ? which is reserved. A calculated value is marked as num which is reserved.

An invalid sign is interpreted as a value and the next operation panics.

Example

fmt.Printf("%f", RPNTuringMachine(values.RPNInput))

Output:

30.000000

Example (Exp)

fmt.Printf("%.13f", RPNTuringMachine(values.Input))

Output:

3.0001220703125