%{
#include <stdio.h>
%}
 
%%
[0-9]+          { printf("NUMBER: %s\n", yytext); }
[a-zA-Z_][a-zA-Z0-9_]*  { printf("IDENTIFIER: %s\n", yytext); }
"=="|"="|"+"|"-"|"*"|"/" { printf("OPERATOR: %s\n", yytext); }
"("|")"|"{"|"}"|";"      { printf("DELIMITER: %s\n", yytext); }
[ \t\n]+        { /* ignore whitespace */ }
.               { printf("UNKNOWN: %s\n", yytext); }
%%
 
int main() {
    printf("Enter the input:\n");
    yylex();
    return 0;
}
 

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