BNF Grammar Derivation

Question

I want to apply rules of BNF Grammar to produce derivation for : a_Num

score 3 · Accepted Answer · answered Nov 10 '09 at 13:33

3

Your question is a bit vague. But below is a BNF (ish) grammar for an integer number.

nz_digit   = '1' | ... | '9';
digit      = '0' | nz_digit;
digitseq   = digit | digitseq, digit;

num        =  '0' | nz_digit, digitseq;

answered Nov 10 '09 at 13:33

Toon Krijthe

1

That's for an unsigned int, depending on the context one might need the minus sign, too. – johannes Nov 10 '09 at 13:36
Agreed, but he can add that himself, I just gave some basic example. – Toon Krijthe Nov 10 '09 at 13:42

1 Answers1