Thread: tolower error

*cough*

Code:

using namespace std;

Not that that's a good idea, but because it's there, the std:: is not required.

Now I'm confused. I looked, but I don't see what you mean . . . the compiler shouldn't be confused about which version of tolower() to use, because there's only one version, as long as only one of <ctype.h> and <cctype> is included.

As far as I know, one should use std::tolower, unless there's a using namespace std or equivalent, in which case it's okay to leave off the std::. Can you elaborate?

Thanks for the link, it explains things very nicely. But it seems that <locale> defines tolower() (not <iostream>); but <iostream> could include <locale>, which might be why a lack of std:: works on some compilers and not others:

1. tolower is (also) a template function prototyped in <locale>:

template <class charT> charT tolower(charT c, const locale& loc);

2. Any standard C++ header is allowed to include any other standard C++
header as an implementation detail (reference 17.4.4.1/1).

From http://www.thescripts.com/forum/thread62974.html

So . . . to the OP: add std::.

Originally Posted by dwks

So . . . to the OP: add std::.

Actually that won't work. What will work is ::tolower.