%{
#include <stdio.h>
#include <string.h>
 
%}
 
KEYWORD     int|float|if|else|while|for|return|void|char|double
DATATYPE    int|float|char|double|void
IDENTIFIER  [a-zA-Z_][a-zA-Z0-9_]*
NUMBER      [0-9]+
OPERATOR    (\+|\-|\*|\/|\=|\==|\!=|\<|\>|<=|>=)
SYMBOL      [;,\(\)\{\}]
 
%%
{KEYWORD}       { printf("Keyword: %s\n", yytext); }
{DATATYPE}      { printf("Datatype: %s\n", yytext); }
{IDENTIFIER}    { printf("Identifier: %s\n", yytext); }
{NUMBER}        { printf("Number: %s\n", yytext); }
{OPERATOR}      { printf("Operator: %s\n", yytext); }
{SYMBOL}        { printf("Symbol: %s\n", yytext); }
[ \t\n]         ;  // Ignore whitespace
.               { printf("Unknown: %s\n", yytext); }
%%
 
int main() {
    yylex();
    return 0;
}
int yywrap() { return 1; }

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