According to the following context - free grammar, write a yacc file as a intege

ID: 3676887 • Letter: A

Question

According to the following context - free grammar, write a yacc file as a integer calculator that can do +, - , *, /, and ^ with or without ( ) .

command expr

expr expr + term | expr – term | term

term term * term2 | term / term2 | term2 | - factor

term2 factor ^ term2 | factor factor ( expr ) | NUMBER.

Also: In order to run calculator on real numbers, add the following in the definition section and make other necessary changes accordingly :

%token NUMBER

%union { double val; char op; }

%type <val> exp term factor NUMBER

%type <op> '+' ' - ' '*' '/' '(' ')'

simple calculator using yacc

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