%{
#include <iostream>
using namespace std;

int no_lines = 0;
int no_cases = 0;
%}

%option noyywrap
DIGIT	[0-9]
LCHAR	[a-z]
UCHAR	[A-Z]
HEX	[A|B|C|D|E|F]

%%

[ \t]		;

\n		{ no_lines++; }

\s		{ no_cases++; }

'#'		;

[+|-]?{DIGIT}+	{ cout << "INTCONST" << yytext << endl; }

[+|-]?{DIGIT}+\.{DIGIT}+	{ cout << "DECCONST" << yytext << endl; }

[+|-]?{DIGIT}+\.{DIGIT}+\E-?{DIGIT}+	{ cout << "SCICONST" << yytext << endl; }

[{HEX}|{DIGIT}]+\H 	{ cout << "HEXCONST" << yytext << endl; }

[0|1]+\B		{ cout << "BINCONST" << yytext << endl; }

[{DIGIT}]{3}\.[{DIGIT}]{3}\.[{DIGIT}]{4}	{ cout << "PHCONST" << yytext << endl; }

\([{DIGIT}]{3}\)\-[{DIGIT}]{3}\-[{DIGIT}]{4}  { cout << "PHCONST" << yytext << endl; }

[{DIGIT}]{3}\-[{DIGIT}]{3}\-[{DIGIT}]{4}  { cout << "PHCONST" << yytext << endl; }

["if"|"then"|"else"|"while"|"end"|"func"|"print"] { cout << "KEYWORD"
                                                    << yytext << endl;}

[{LCHAR}|{UCHAR}][{DIGIT}|{LCHAR}|{UCHAR}]*	{ cout << "IDENT" << yytext << endl; }

\"[{DIGIT}|{LCHAR}|{UCHAR}|\s]\"	{ cout << "STRCONST" << yytext << endl; }

[\+|\-|\*|\/|\<|\>|\=]		{ cout << "OPERATOR" << yytext << endl; }
%%

int main()
{
  cout << "Hello FLEX!" << endl;
  yylex();
  cout << "Done!" << endl;
  return 0;
}