new

 %{
	#include<stdio.h>
%}

%%

[-+0-9]+ { printf ("%s is not a float.\n", yytext); }
[-+0-9]*(\.)[0-9]+	{printf("%s is a float.\n",yytext);}
[a-zA-Z]+	{ printf ("%s is not a number.\n", yytext); }

%%

int yywrap(){}

int main()
{
	printf("\nA lex specification to recognize Integer:\nEnter your input: ");
	yylex();
	return 0;
}