On Sat, Jan 04, 2014 at 06:34:51PM +0000, Ramón T. B. wrote:
> I'm testing the first example in the tutorial: vanilla private keys (see the source code attached)
> ...
>
> But it outputs nothing. Why it could be?

The attached code works fine for me.

Run it through a debugger (for GDB, compile with -ggdb). Then something
like:

gdb ./keypairGen
break main.cpp:11
run
backtrace