%{
#include <stdio.h>
 
int kw=0, id=0, num=0, op=0, punc=0;
%}
 
%%
int|float|char|if|else|while|for|return   { printf("KEYWORD : %s\n", yytext); kw++; }
 
[a-zA-Z_][a-zA-Z0-9_]*   { printf("IDENTIFIER : %s\n", yytext); id++; }
 
[0-9]+   { printf("NUMBER : %s\n", yytext); num++; }
 
==|<=|>=|!=|\+|-|\*|/|=|<|>   { printf("OPERATOR : %s\n", yytext); op++; }
 
[;,\(\)\{\}]   { printf("PUNCTUATION : %s\n", yytext); punc++; }
 
[ \t\n]+   ;
 
.   { printf("LEXICAL ERROR : Invalid symbol %s\n", yytext); }
%%
 
int main()
{
    yylex();
    printf("\nFINAL COUNT\n");
    printf("KEYWORD : %d\n", kw);
    printf("IDENTIFIER : %d\n", id);
    printf("NUMBER : %d\n", num);
    printf("OPERATOR : %d\n", op);
    printf("PUNCTUATION : %d\n", punc);
    return 0;
}
 

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aW50IGEgPSA1Ow==

int a = 5;