Lex Compiler Editor Online
If you are installing Ubuntu (or any Linux based OS) on your system either through Virtual Box or by making your system Multi-Bootable, just to execute your Lex & Yacc programs; then you might be wasting your HDD space & your valuable time. You can easily skip this annoying process and run your programs in Windows OS without any hassles.
Here’s how you can do it:
Installing Softwares:
Here’s how you can do it:
Installing Softwares:

Editor De Fotos Online
LEX: Lex - A Lexical Analyzer Generator M. Lex helps write programs whose control flow is directed by instances of regular expressions in the input stream. It is well suited for editor-script type transformations and for segmenting input in preparation for a parsing routine. Online Bash Compiler, Online Bash Editor, Online Bash IDE, Bash Coding Online, Practice Bash Online, Execute Bash Online, Compile Bash Online, Run Bash Online, Online Bash Interpreter, Execute Bash Shell Online (GNU Bash v4.4) Desktop Preview. Tablet 768x1024.
- Download Flex 2.5.4a
- Download Bison 2.4.1
- DownloadDevC++
- Install Flex at “C:GnuWin32“
- Install Bison at “C:GnuWin32“
- Install DevC++ at “C:Dev-Cpp“
- Open Environment Variables.
- Add “C:GnuWin32bin;C:Dev-Cppbin;” to path.

Compilation & Execution of your Program:


Lex Compiler Editor Online Download
- Open Command prompt and switch to your working directory where you have stored your lex file (“.l“) and yacc file (“.y“)
- Let your lex and yacc files be “hello.l” and “hello.y“. Now, follow the preceding steps to compile and run your program.
- For Compiling Lex file only:
- flex hello.l
- gcc lex.yy.c
- For Compiling Lex & Yacc file both:
- flex hello.l
- bison -dy hello.y
- gcc lex.yy.c y.tab.c
- For Executing the Program
- a.exe
Mini C Compiler Lex Yacc
Video: