%{
  #include<stdio.h>
  #include<stdlib.h>
%}
 
 
 
number [0-9]+
identifier [a-zA-Z_][a-zA-Z0-9+]*
keyword if|while|do|else|int|float|double
 
%%
 
{number} {printf("the given %d is a number",atoi(yytext));}
{identifier} {printf("the given %s is a identifier",yytext);}
{keyword} {printf("the given %s is a keyword",yytext);}
.* {printf("the given %s is a keyword",yytext);}
 
%%
 
int main(void)
{
  printf("enter the input");
  yylex();
  return 0;
}

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