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 :

1. gcc -c cparser.c -lm ; which will give cparser.o
2. g++ -c main.cpp; which will give main.o
3. 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 :
  1. $0 to $9 = expr ---for inbuilt variables
  2. 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.