Instructions_for_Win10.txt

Installation on Win10:
======================
1- install DEV C++ in C:\Program Files (x86)\Dev-Cpp\

2- Download Flex from http://gnuwin32.sourceforge.net/downlinks/flex.php

3- Install Flex in C:\GnuWin32

4- Download Bison from http://downloads.sourceforge.net/gnuwin32/bison-2.4.1-setup.exe

5- Install Bison in C:\GnuWin32

6- Create file Lex.bat in C:\GnuWin32\bin and put following one line into it using notepad:
@flex -l %1 %2 %3 %4 %5 %6 %7 %8 %9

7- Create file Yacc.bat in C:\GnuWin32\bin and put following one line into it using notepad:
@bison -y %1 %2 %3 %4 %5 %6 %7 %8 %9

8- Update PATH to include folders C:\GnuWin32\bin and C:\Program Files (x86)\Dev-Cpp\MinGW64\bin using following steps:
   a- Open "System Properties" by running SystemPropertiesProtection.exe
   b- Jump to "Advanced" tab
   c- Press "Environment Variables" button
   d- In the bottom section, select the system variable "Path" and press the Edit button
   e- Press the "New" button, type C:\GnuWin32\bin and press enter
   f- Again Press the "New" button. Type C:\Program Files (x86)\Dev-Cpp\MinGW64\bin and press enter
   g- press OK
   h- press OK
   i- press OK


Setting up and Running the Calc example:
======================================== 
1- Create folder C:\GnuWin32\Projects\Calc

2- Create file C:\GnuWin32\Projects\Calc\calc.l with contents from https://github.com/jengelsma/yacc-tutorial/blob/master/calc.l

3- Create file C:\GnuWin32\Projects\Calc\calc.y with contents from https://github.com/jengelsma/yacc-tutorial/blob/master/calc.y

4- open command prompt window

5- enter command "cd C:\GnuWin32\Projects\Calc" to make it your current directory

6- enter command "yacc -d calc.y" to generate y.tab.c and y.tab.h files

7- enter command "lex calc.l" to generate lex.yy.c file

8- enter command "gcc lex.yy.c y.tab.c -o calc.exe" to compile the generated c programs into an executable.

9- run the executable by issuing the command "calc.exe"

10- Test it by entering "print 2+3;"