/* File: postfix.y */ 
%{
#include <stdio.h>
%}

%token NAME NUMBER
%%
statement:	NAME '=' expression
	| expression	{
		printf("\n") ;	
	}
	;

expression:	
	expression '+' term	{ 
		printf("+ ") ;
	}
	| expression '-' term	{ 
		printf("- ") ;
	}
	| term {
		/* do nothing */
	}
	;

term:
	term '*' factor {
	   printf("* ") ;
	}
	| term '/' factor {
	   printf("/ ") ;
	}
	| factor {
		/* do nothing */
	}
	;

factor:
	'(' expression ')' {
		/* do nothing */
	}
	| NUMBER {
		printf("%d ", $1) ;
	}
	;

%%

main() {
   yyparse() ;
}