BASIC Interpreter written in 200 lines of C99.
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
Matthilde ec68caebf7 emacs smh 10 months ago
.gitignore mu 10 months ago
Makefile mu 10 months ago
README.txt emacs smh 10 months ago
basic.c mu 10 months ago
guess_number.bas mu 10 months ago

README.txt

   ooo        ooooo  .o8                           o8o            
`88. .888' "888 `"'
888b d'888 888oooo. .oooo. .oooo.o oooo .ooooo.
8 Y88. .P 888 d88' `88b `P )88b d88( "8 `888 d88' `"Y8
8 `888' 888 888 888 .oP"888 `"Y88b. 888 888
8 Y 888 888 888 d8( 888 o. )88b 888 888 .o8
o8o o888o `Y8bod8P' `Y888""8o 8""888P' o888o `Y8bod8P'
--------------------------------------------------------------
Small BASIC interpreter written in C by matthilde
Licensed under the WTFPL license

Here I come with yet another project done in a few hours.
Mbasic is a very simple BASIC dialect that fits in ~200 lines of C99.

TABLE OF CONTENTS
=================

* Building and Usage
* Files
* Programming in Mbasic
* Syntax
* Commands Reference
* Licensing

BUILDING AND USAGE
==================

COMPILING: run `make` or `cc -std=c99 basic.c -o basic`
USAGE: mbasic [FILENAME]
if no FILENAME is specified, it will read from stdin.

FILES
=====

Makefile - the makefile
README.txt - what you are currently reading
basic.c - the BASIC interpreter
guess_number.bas - little "Guess the number" game

PROGRAMMING IN MBASIC
=====================

SYNTAX
------

The syntax is fairly simple
; This is a comment
10 PRINT "This is a line of code"
; Arguments are seperated with whitespace
20 PRINT "1 + 1 = " 2+2
; That means math expressions cannot have whitespace

* Comments cannot be at the end of a line of code. (too lazy to
implement that lmao).
* All lines must start with a digit that defines the line of code.
* Math expressions does not support parentheses.
* There is a special variable in math expression called `RANDOM` which
gives a random integer between 0 and RAND_MAX (whatever the value
of it is in your C compiler).
* Variables can only hold integers, the quoted strings can only be
used in the PRINT command.

COMMANDS REFERENCE
------------------

The programming language has 8 commands:

PRINT args ... - Prints the specified args
INPUT varname - Ask the user for a number and store it in the
specified variable
VAR varmame v - varname = v
IF cond loc... - if cond>0 then run "loc"
GOTO line - Go to the specified line
GOSUB line - Go to subroutine at specified line
RET - Return from subroutine
END - Stops the program

LICENSING
=========

This program is licensed under the WTFPL.