You can write games for mobile devices in C++, yes . In fact it is a common choice if you want your codebase to be cross-platform across iOS and Android.
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Yes , you can use C++ (even Xcode supports it) and the code will compile and run on any iOS device, but the view controllers of your app have to be in Objective-C or Swift. In a real-world scenario, this means that you cannot access the UI from C++, but you can only use it for the core of your app.23 Oca 2011
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