This is a port of the mruby/c tutorial Chapter 03 to the mbed environment.

Dependencies:   mbed

For details, refer to the following.

http://www.s-itoc.jp/activity/research/mrubyc/mrubyc_tutorial/436

Note:There is a change in rtt0.h from the original source in the mruby/c. It was necessary for inclusion in C ++ source.

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