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 ?

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

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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.

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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.