%{
#include<stdio.h>
%}
%%
[0-9]+[.][0-9]+ printf("%s is a floating point number\n",yytext);
int|float|char|double|voidprintf("%s is a datatype\n",yytext);
[0-9]+ printf("%s is an integer number\n",yytext);
[a-z]+[()] printf("%s is a function\n",yytext);
[a-z]+ printf("%s is an identifier\n",yytext);
[+=*/-] printf("%s is an operator\n",yytext);
printf("%s is an delimiter\n",yytext);
printf("%s is a separator\n",yytext);
[#][a-z\.h]+ printf("%s is a preprocessor\n",yytext);
%%
intyywrap(void) {}
int main()
{
// reads input from a file named test.c rather than terminal
freopen("test.c", "r", stdin);
yylex();
return 0;
}