flex & YACC question

I'm following this: http://www.telenovela-world.com/~spa...C-HOWTO-4.html since I've always fancied writing my own programming language. I was hoping flex and yacc would relieve some stress... yeah right.

This grammar:

Code:

---

%{
#include <stdio.h>
#include <string.h>

void yyerror(const char* str)
{
        fprintf(stderr, "error: %s\n", str);
}

int yywrap()
{
        return 1;
}

main()
{
        yyparse();
}

%}

%token NUMBER TOKHEAT STATE TOKTARGET TOKTEMP

commands:
        | commands command
        ;

command:
        heat_switch
        |
        target_set
        ;

heat_switch:
        TOKHEAT STATE
        {
                printf("\tHeat turned on or off\n");
        }
        ;

target_set:
        TOKTARGET TOKTEMP NUMBER
        {
                printf("\tTemperature set\n");
        }
        ;

---

Doesn't compile:

Quote:

---

[lee@localhost c_cpp]$ yacc -d thermo.y
yacc: e - line 24 of "thermo.y", syntax error
commands:
^

---

I was hoping somebody here might be able to help me - not sure how much this is used though.

:(

remember it's:

Code:

---

declarations
%%
rules
%%
programs

---

so try a %% after your tokens

Also I suggest writing something by hand, it makes it a lot easier since you have a solid understanding of what is going on.

Cheers valis, I'll probably write my own one day :)