%{
#include <iostream>
using namespace std;
#define YY_DECL extern "C" int yylex()
%}
%%
[ tn]         ;
[0-9]+.[0-9]+  { cout << "Found a floating-point number:" << yytext                         << endl;   }
[0-9]+          { cout << "Found an integer:" << yytext << endl; }
[a-zA-Z0-9]+    { cout << "Found a string: " << yytext << endl; }
%%
 int main(int, char**) {
    // lex through the input:
    yylex();
}