If you already have a boost dependency (which many people these days do), you can use the boost multi-precision library. In fact, it already has an example of a factorial program that can support output up to 128 bits, though extending it further is pretty trivial. Share a link to this answer. improve this answer. answered Aug 5 '13 at 14:11.
Of course it is important that children learn to write the number symbols correctly, and we have plenty help with that at Activity Village. First Steps Playdough letters. A good first step before children attempt to write numbers is to have a go at forming them out of playdough. Some children will take to this and it will help them remember the shape of the numbers. Others won't be very.