cygwin g++ std::stoi “error: ‘stoi’ is not a member of ‘std

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That’s a bug, possibly an incomplete port of some library code to cygwin (it’s a cplusplus11 feature) – some stuff has to be changed after all. Make sure to report it.

The solution is easy of course: #include <cstdlib> strtol(s.c_str(),0,10);

www.cplusplus.com/…/strtol

A similar mingw bug is mentioned also here

std::stoi doesn’t exist in g++ 4.6.1 on MinGW

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