%{
#include <stdio.h>
#include "y.tab.h" // This header file contains token definitions from Bison
%}
 
%%
[0-9]+      { yylval.num = atoi(yytext); return NUMBER; }
"+"         { return OPERATOR_PLUS; }
"-"         { return OPERATOR_MINUS; }
"*"         { return OPERATOR_MULT; }
"/"         { return OPERATOR_DIV; }
"("         { return LPAREN; }
")"         { return RPAREN; }
[ \t\n]     ; // Ignore whitespace and newline characters
.           { fprintf(stderr, "Unexpected character: %s\n", yytext); }
%%
 
int yywrap() {
    return 1; // Indicate end of input
}
 

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