error: 'stoi' was not declared in this scope (Code::Blocks 16.01 on Windows 10)

Question

I get the error: 'stoi' was not declared in this scope.

#include <string>
using namespace std;
...
int x;
x = stoi(arg[0]);

I am running Code::Blocks 16.01 on Windows 10 with the -std=c++11 setting.

I didn't find any useful information on this page: ‘stoi’ was not declared in this scope

I saw somewhere that upgrading gcc can fix this problem, but I didn't find an appropriate installation on the page: https://mingw-w64.org/doku.php/download

The same code works fine in Code::Blocks 13.12 on Linux Mint 17.3.

Is there a recommended fix for this problem? Can this be fixed by using the 64 bit version of MinGW (assuming that is compatible with Code::Blocks 16.01)?

Update there is a workaround, using atoi and c_str instead:

x = atoi(arg[0].c_str());

Code::Blocks is an IDE. Windows is an OS. What is your *compiler* version? — n. m. could be an AI, Jan 05 '17 at 19:00
The clue is in the question! In other words whatever gcc ships with Code Blocks 16.01, I believe it is gcc 4.8, but don't quote me on that. — gornvix, Jan 05 '17 at 19:14
It is in your best interest to know what compiler version you are using. Find it out, don't outsource this to volunteer helpers. — n. m. could be an AI, Jan 05 '17 at 19:22

score 2 · Answer 1 · edited May 23 '17 at 12:08

2

I believe that this is a bug with MinGW. For more information, check out this StackOverflow post. Specifically, DRH's answer.

edited May 23 '17 at 12:08

Community

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answered Jan 05 '17 at 19:06

NoseKnowsAll

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If you believe the answer is on another question you should flag this question as a duplicate. – NathanOliver Jan 05 '17 at 19:23
@NathanOliver I don't believe I have enough reputation to flag answers as a duplicate - otherwise I certainly would have. – NoseKnowsAll Jan 06 '17 at 00:17
Sure you can. [You can flag questions at 15 rep](http://stackoverflow.com/help/privileges/flag-posts) – NathanOliver Jan 06 '17 at 01:42

error: 'stoi' was not declared in this scope (Code::Blocks 16.01 on Windows 10)

1 Answers1