Question

I want to use std::stoi. Although I could use ::atoi(str.c_str()) it would make the code cleaner if this would work. But Eclipse tells me:

Function ‘stoi’ could not be resolved

I checked that

• the header <string> is included,
• include paths are set correctly, as I can use std::string,
• the compiler flag -std=c++0x -std=c++11 is set too.

Is stoi() missing in gcc, or is it somehow my fault?

I am using gcc (Debian 4.7.2-4) 4.7.2.

Answer 1

You’re using GCC 4.7.2, so std::stoi is supported. You can ignore the Eclipse warning. It should compile and run fine. The problem is with the Eclipse editor, not with GCC.

(You only need the -std=c++11 or -std=gnu++11 [to also get the GCC extensions] flag, btw. -std=c++0x is just a deprecated synonym.)