[ZZ]bison flex for windows 使用说明

you will need the lastest versions of:

flex-2.5.4a-1.exe

bison-2.4.1-setup.exe

After that, do a full install in a directory of your preference without
spaces in the name. I suggest

C:\GnuWin32

.
Do not install
it in the default (C:\Program
Files (x86)\GnuWin32) because bison has problems with spaces in directory names, not to say parenthesis.

Also, consider installing Dev-CPP in
the default directory (

C:\Dev-Cpp

)

After that, set the PATH variable to include the bin directories of

gcc

(in

C:\Dev-Cpp\bin

)
and

flex\bison

(in

C:\GnuWin32\bin

).
To do that, copy this:

;C:\Dev-Cpp\bin;C:\GnuWin32\bin

and
append it to the end of the

PATH

variable,
defined in the place show by this figure:



If the figure is not in good resolution, you can see a step-by-step
here.

Open a prompt, cd to the directory where your ".l" and ".y" are, and compile them with:

flex
hello.l

bison
-dy hello.y

gcc
lex.yy.c y.tab.c -o hello.exe

You will be able to run the program. I made the sources for a simple test (the infamous

Hello
World

):

Hello.l

%{

#include <stdlib.h>
#include "y.tab.h"

%}

%%

("hi"|"oi")"\n"       { return HI;  }
("tchau"|"bye")"\n"   { return BYE; }
.                     { yyerror();  }

%%

int main(void)
{
yyparse();
return 0;
}

int yywrap(void)
{
return 0;
}

int yyerror(void)
{
printf("Error\n");
exit(1);
}

Hello.y

%token HI BYE

%%

program:
hi bye
;

hi:
HI     { printf("Hello World\n");   }
;
bye:
BYE    { printf("Bye World\n"); exit(0); }
;