std::atof or std::stof (c++11) unable to convert properly ("1.24")

Question

I'm a little bit frustrated after I've found this strange atof/stof behavior

double bg = std::stof("1,24");
std::cerr<<"comma: "<<bg<<std::endl;
bg = std::stof("1.24");
std::cerr<<"dot: "<<bg<<std::endl;

when I change the string format, from comma to dot, this is what happens:

comma: 1.24
dot: 1

has anyone encountered this problem? thanks

bart

Danedanegeld

You must have the French comma style selected in your Windows options. – Handbag

I'm on a Linux distro, actually – Danedanegeld

You must have the French comma style selected in your Linux options. – Handbag

I've solved using istringstream, but however the problem is not the "french comma style" That one, the "1.24", was just an example. I've encountered the problem reading data from a file, generated with fstream @QuentinUK, thanks for the answers. However, how can I disable this option? – Danedanegeld

You could call imbue on the stream object and set a locale without that problem. You could also use std::locale::global(std::locale("en_US.UTF-8")); on your main function but this has a problem that any other thread of your app could change it. – Blagoveshchensk