What type is a "unsigned any_variable" variable belongs to ? whats its size?

Is it equivalent to a unsigned integer ?开发者_如何转开发

I'm able to use unsigned unknown_type_var = 3332934; and print it successfully. This value is greater than a integer variable right ?

unsigned is totally equivalent to unsigned int, just like long is equivalent to long int, etc.

It is same as unsigned int. By default the type is int.

The max value for unsigned int is 4294967295. This limits are defined in the LIMITS.H header file. Refer http://msdn.microsoft.com/en-us/library/7fh3a000.aspx.

unsigned just means that it doesn't use the first bit as a sign (positive, negative) so it is always positive and has twice the capacity of a signed any_variable.

This stackoverflow question should help explain signed and unsigned variables in depth: What does the C++ standard state the size of int, long type to be?

Most C implementations use 4 bytes for integers so that's a range between ~-2bil to ~2bil or 0 to 4bil for unsigned ints so your variable is well within the range of an interger.