Integer types fall into the following categories:
The unsigned prefix indicates that the object is a nonnegative integer. Each unsigned type provides the same size storage as its signed equivalent. For example, int reserves the same storage as unsigned int. Because a signed type reserves a sign bit, an unsigned type can hold a larger positive integer value than the equivalent signed type.
The declarator for a simple integer definition or declaration is an identifier. You can initialize a simple integer definition with an integer constant or with an expression that evaluates to a value that can be assigned to an integer.
When the arguments in overloaded functions and overloaded operators are integer types, two integer types that both come from the same group are not treated as distinct types. For example, you cannot overload an int argument against a signed int argument.
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