Context free grammar modification for simple arithmetic Expression

Question

given a CFG

E->TE'
E'->+TE'|-TE'|null
T->FT'
T'->*FT'|/FT'|null
F->(E)|number

how to implement this CFG in C Program so that it take multiple digit input in expression.for Example - i want to give 320/40-12*2+1*32 as input in the above CFG converted code.

Thanks

Answer 1

Add the rules:

number -> digit | digit number
digit -> 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

Now write a parser in C. Since this is a trivial LL(1) grammar, the easiest way to do that is with recursive descent -- write a function for each non-terminal in the grammar that recognizes that non-terminal on your input and consumes it.