How to use the same C++ code for Android and iOS?

Best tutorial on using C++ code with iOS and Android

Please read this wonderful StackOverflow post:

http://stackoverflow.com/a/18334548/950427

How to install Objective C on Ubuntu

How to install Objective C packages:

To install them:

sudo apt-get install gobjc gnustep gnustep-make gnustep-common

To compile files:

gcc -o hello hello.m -Wall -lobjc