https://github.com/yjdoc2/equation-parser-interpreter

An interpreter designed in C++ for the equation parser project.This can read the commands from a file and write output to another file.
https://github.com/yjdoc2/equation-parser-interpreter

c cpp17 interpreter parser

Last synced: 23 days ago
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An interpreter designed in C++ for the equation parser project.This can read the commands from a file and write output to another file.

• Host: GitHub
• URL: https://github.com/yjdoc2/equation-parser-interpreter
• Owner: YJDoc2
• License: mit
• Created: 2019-11-29T11:41:45.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2019-12-04T13:43:36.000Z (over 6 years ago)
• Last Synced: 2025-03-20T17:52:38.613Z (about 1 year ago)
• Topics: c, cpp17, interpreter, parser
• Language: C
• Homepage:
• Size: 1.17 MB
• Stars: 2
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Equation-Parser-Interpreter

This is an file based interpriter for Equation Parser.

## Basic Usage

#### Compiling

generate the runfile using makefile and make command (on linux), requires gcc and g++, with c++ std 14 support.

For manual compiling :



gcc -c cparser.c -lm ; which will give cparser.o 

g++ -c main.cpp; which will give main.o 

g++ -o eqparse cparser.o main.o; which will give eqparse



#### running

eqparse <script_file> [output_file]  (Without Brackets)

script file is any valid text file written with valid syntax.  

output file is optional.

If not given output will be given on standerd output - either console or redirected file if output redirection is done.

If given output will  Overwrite  the file.

## Syntax :



All Non-comment Lines should be less than 150 characters long in total.

Lines starting with ' // ' and empty lines will be ignored.

Contents of line starting with ' # ' will be copied as it is (except #) in the output.

All inbuilt commands, equations and variable assignments must be given on a line by themselves,i.e. Comments cannot start mid-way in a line.

Allowed inbuild commands Are : showvars , vardump , varload , varclear.



to solve an equation, or for variable assignment, give the expression on the line by itself.

Assignment of variable can be done as :



$0 to $9 = expr ---for inbuilt variables

varname = expr ---for custom named variables.





To find roots of a polynomial equation , use polysolve <space> expr

To solve system of linear equation with less than 9 variables:



First give linsolve <space> <number of variables (n)>

Then give the linear equations using variables x0 to x(n-1) on next consecutive lines.







Also look at syntax of  Equation Parser Mk II  for general syntax.