%{
#include <stdio.h>
#include <stdlib.h>
%}
 
%%
// --- Regular Expressions (token definitions) ---
int             [a-zA-Z_][a-zA-Z0-9_]*
float           [0-9]+\.[0-9]+
digit           [0-9]+
keyword         int|float|if|else|for|while|return
 
// --- Token Rules and Actions ---
{keyword}       { printf("Token: %s | Type: KEYWORD\n", yytext); }
{float}         { printf("Token: %s | Type: CONSTANT (FLOAT)\n", yytext); }
{digit}         { printf("Token: %s | Type: CONSTANT (INT)\n", yytext); }
{int}           { printf("Token: %s | Type: IDENTIFIER\n", yytext); }
"+"|"-"|"*"|"/" { printf("Token: %s | Type: OPERATOR\n", yytext); }
"(" | ")" | ";" | "," { printf("Token: %s | Type: PUNCTUATION\n", yytext); }
[ \t\n\r]+      { /* Ignore whitespace */ }
.               { printf("Token: %s | Type: UNKNOWN\n", yytext); }
 
%%
 
// --- Main Function ---
int main(int argc, char** argv) {
    yylex();  // Start lexical analysis
    return 0;
}

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