Too many problems with unsigned. Stick with signed.<p><a href="https:&#x2F;&#x2F;google-styleguide.googlecode.com&#x2F;svn&#x2F;trunk&#x2F;cppguide.html#Integer_Types" rel="nofollow">https:&#x2F;&#x2F;google-styleguide.googlecode.com&#x2F;svn&#x2F;trunk&#x2F;cppguide....</a>