%{
#include <stdio.h>
#include <stdlib.h>
#define KEYWORD1 "int"
#define KEYWORD2 "float"
#define KEYWORD3 "return"
#define KEYWORD4 "if"
#define KEYWORD5 "else"
%}
%option noyywrap
%%
"int" { printf("Keyword: %s\n", yytext); }
"float" { printf("Keyword: %s\n", yytext); }
"return" { printf("Keyword: %s\n", yytext); }
"if" { printf("Keyword: %s\n", yytext); }
"else" { printf("Keyword: %s\n", yytext); }
[a-zA-Z_][a-zA-Z0-9_]* { printf("Identifier: %s\n", yytext); }
[ \t\n]+ ; /* Skip whitespace */
. { printf("Other character: %c\n", *yytext); }
%%

int main(int argc, char **argv) {
    yylex();
    return 0;
}

int yywrap() {
    return 1;
}