Format a Large Number [duplicate]

This question already has answers here: Closed 11 years ago.

Possible Duplicate:开发者_开发百科

How to format a number from 1123456789 to 1,123,456,789 in C?

How can I format a large integral number with commas in C, such that the readability is improved?

222222 should be 222,222 and 44444444 should be 44,444,444.

---

You do not need to do the formatting yourself; printf in Unix has a ' modifier:

printf("%'d\n", number);

It looks like Visual Studio doesn't support that. This syntax is locale-aware, however.

---

Use the modulus (%) operation and build your own string.

---

If you google for "c format thousands separator" then one of the hits is this page http://www.codeguru.com/forum/archive/index.php/t-402370.html
It's C++ though but it should give you an idea of what you can do.