%option noyywrap
%{
#include <stdio.h>
%}
 
%%
[ \t\n]+                 { printf("white Space\n"); }
int|float|return         { printf("Keyword: %s\n", yytext); }
[a-zA-Z_][a-zA-Z0-9_]*   { printf("Identifier: %s\n", yytext); }
[0-9]+(\.[0-9]+)?        { printf("Number: %s\n", yytext); }
[+\-*/=]                 { printf("Operator: %s\n", yytext); }
[\(\)\{\}\[\];,]         { printf("Special character: %s\n", yytext); }
.                        { printf("Unknown character: %s\n", yytext); }
%%
 
int main(void) {
    yylex();
    return 0;
}
abc123 _test var1
12 45.67 89.0

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