%{

/*  
All of the below productions that do not have associated 
actions are using the DEFAULT action -- $$ = $1 
*/

%}
%token PLUS TIMES INT CR RPAREN LPAREN

%%
lines	:	lines line
	|	line
	;
line	:	expr CR 		{printf("= %d\n",$1); }
	;
expr	:	expr PLUS term 		{$$ = $1 + $3; }
	|	term
	;
term	:	term TIMES factor	{$$ = $1 * $3; }
	|	factor
	;
factor	:	LPAREN expr RPAREN	{$$ = $2;}
	|	INT
	;
%%