%{
int b=0;
int t=0;
int valid=0;
int flag=0;
int f=0;
int v=0;
int o=0;
%}

/*** Rule Section ***/
%%
if|else|while|int|switch|for|char|float|double t++ ; printf("Valid Keywords\n");
^[a-z A-Z _][a-z A-Z _ 0-9]*$ v++ ; printf("Valid Identifier\n");
^[/]{1}[/]{1}[a-zA-Z0-9]* b++; printf("Valid Comment");
^[/]{1}[*]+{1}[a-zA-Z0-9]*[*]{1}[/]{1} b++; printf("Valid Comment");
^[/]+[a-zA-z]*[0-9]*[/]+ b++; printf("Valid Comment");
^[0-9]*[.][0-9]+e^[0-9]*[.][0-9]+ valid++; printf("Valid Exponential Number\n");
^[0-9]+e^[0-9]+ valid++; printf("Valid Exponential Number\n");
^[0-9]+$ flag++ ;printf("Valid Integer Number\n");
^[0-9]*[.][0-9]+ f++; printf("Valid Floating point number\n");
^[+-/*=] o++; printf("Valid Operator \n");
\n {return 0;}
%%

/*** Code Section ***/
int yywrap(){}
int main(){
yylex();
if (f==0 && b==0 && t==0 && valid==0 && flag==0 && v==0 && o==0 ) printf("Invalid \n");