C++ splitting string?

Question

I've been dealing with C++ strings and currently I am wondering how can I split the article of a string and the data that's left.

Let's say I have this string:

a gold coin

How can I split the article which in this case is a into a separate string and then get all the other data contents into a different string which in this case is gold coin?

Please note that the article can sometimes be an and sometimes have no article.

Edit I am not trying to split strings from a space token I am splitting special words from the string in condition for extracting a pronoun article name and the pronoun string.

Will you always have a simple `[article] [nouns]` layout or do you need to parse complex sentences? — Neil Kirk, Oct 10 '14 at 01:31
I would love to write an answer but I updated my system and it borked everything. Look into std::string::substr(). You could check for mystring.substr( 0, 3 ) == "an " || mystring.substr( 0, 2 ) == "a ". If you match either, mystring.substr( 4 ) in the first case of mystring.substr( 3 ) in the 2nd case should give you the rest of the string. — kiss-o-matic, Oct 10 '14 at 01:31
the linked question goes over strategies on how to use `substr`, `replace`, etc to split a string. — Rapptz, Oct 10 '14 at 01:34

score 1 · Answer 1 · answered Oct 10 '14 at 01:29

1

You can use

.replace

str.replace(str.begin()+1,str.end()1,1,'');

the reference

answered Oct 10 '14 at 01:29

3

I assumed the OP wants two resultant strings. – Neil Kirk Oct 10 '14 at 01:31

score 1 · Answer 2 · answered Oct 10 '14 at 01:39

My approach would be:

find the end of the first word: std::string maybe_article = input.substr(0, input.find_first_of(" \t"));
check if it's an article: if (maybe_article == "a" or maybe_article == "the" or maybe_article == "the")
if so, take the substring. return input.substring(input.substr(input.find_first_not_of(" \t", maybe_article.size())));
otherwise, return just the original string. return input;

It's possible to avoid the allocation of maybe_article, but if you're restricting yourself to the standard library this is the most obvious way, and is easily modified to support a count in place of the article.

Personally I gave up on std::string and wrote my own.

C++ splitting string?

2 Answers2