c++ - 'strtoll' and many others "not a member of 'std'"

Question

strtoull,strtof,strtold,vsnprintf,wcstoll,wcstoull,wcstof, and wcstold are not members of 'std.' The problem is I don't use any of these functions. I didn't even know they existed. they are in file basic_string.h, which I also didn't know I was using. I'm using VS2015 so I assume I am compiling using the VSC++ 14.0 compiler.

I see that there over a dozen similar questions but I can only find two common errors: not using the C++11 flag and not #includeing . I have had the C++11 flag set and #include <algorithm> changes nothing. this question makes me curious,though. I thought the order of #includes didn't matter. I tried system libraries <> first and 3rd party libraries second "" and also vice-versa and observed no difference.

I also tried #include "stdafx.h" as some other answers indicated, but no such file exists.

not sure what to include here because I finally got to the point where the IDE identifies no errors in my code. again, all the issues are in "basic_string.h." here are my includes:

#include <iostrream>
#include <string>
#include <cstring>
#include <sstream>
#include <map>

#include "curl/curl.h"
#include "curl/easy.h"

this may be a continuation of my other question here, which I will update now.

edit 1: I have included <cstdlib>,<cstdio>,and<cwchar> and I see no difference. I'm curious why it's having issues with functions I've never used in files I've never touched.

I totally forgot I ran a repair on VS2015 yesterday and here are the results. I'm not sure if these are optional modules or core issues or what. "Windows Software Development Kit" sounds important but I am not developing for a windows machine(though I am developing on Win7).

edit 2: someone asked for minimal reproducible code. here is the whole file sans comments:

#include <iostream>
#include <string>
#include <cstring>
#include <cstdlib>
#include <sstream>
#include <map>
#include <cstdio>
#include <cwchar>

int main(int argc, char *argv[])
{
return 0;
}

just realized I don't need all the includes for nothing(because i commented all functional code out) so I will now see which one is causing the issue.

edit 3 : cstring,cstdlib,cstdio, cwchar, and the two curl headers are the only headers that will not cause this issue. I can include all six of them at once without issue. any other #include that was mentioned in the OP or the previous edit will cause the same ...is not a member of 'std'error. However, I don't think I had any of the <c...>included before I started having this issue.iostream,string,sstream,map each (individually even) cause this issue. are we still looking at a complete VS2015 reinstall?

edit 4: As one user suggested, I tried to make a new project but this is what happened. I was really hoping we wouldnt get to this point because I'm not sure how much you all will be able to help. Basically,we have some complicated build setup which I don't understand. The other guy who works here also does not understand the setup. The one person who knows is out on paternity leave. I'm developing on one machine and building/debugging on a server. However, I was poking around the settings and I saw a different diagram that has a second server in the mix and I'm not sure how that plays into it. After that, it is deployed to a different machine. Anyway I selected the same options as the current project but I can't even create a blank one. I'm not sure if this failure is because of this complicated system or because my VS2015 is messed up. Either way I can't fix this as it is so I think I will work on repairing VS2015 (which already had issues once) while monitoring this thread to see if this new project error reveals something important. thanks a lot to all who helped so far

edit 5: I'm taking next week off. I won't be able to give any updates till the 3rd for anybody who still cares. I'm going to repair and then reinstall

Answer 1

Those functions are in the namespace std if you include the correct standard headers, which are <cstdlib>, <cstdio> and <cwchar>. "basic_string.h" is not a standard header; it is probably some implementation specific header. "stdafx.h" is what Visual Studio uses for precompiled headers (it's not in the standard either) and the order in which you include headers can matter although it usually shouldn't.