Two example of derived data types in c plus plus?

Answer 1

The fundamental built in data types in C++ are integral (char, short, int, and long) and floating (float, double, and long double1).

The fundamental derived data types in C++ are arrays, functions, pointers, and references.

The composed derivative data types in C++ are classes, structures, and unions.

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1Microsoft specific ??

Answer 2

You cannot have a "fundamental derived data type". There are only three fundamental data types in C++: integral, floating and void. You cannot derive from a fundamental data type. A function is only fundamental insofar as all functions, like all instances of a type, are addressable.

Answer 3

The standard library is replete with derived data types. For instance, the I/O stream class hierarchy is defined as follows:

class ios_base;

class basic_ios<> : public ios_base;

class basic_istream<> : virtual public basic_ios<>;

class basic_ostream<> : virtual public basic_ios<>;

class basic_iostream<> : public basic_istream<>, public basic_ostream<>;

The standard library also includes two specializations of these types which cater for the two most common type of I/O stream: char and wchar_t (narrow and wide streams, respectively).

Answer 4

An array is not a derived type since it is not an object, it is a structure. An array is simply a block of contiguous memory containing one or more elements of a given type, whether those types are primitive data types or complex data types (objects).

Answer 5

Derived data types are based on fundamental data types. i.e. a derived data types is represented in the memory as a fundamental data type.

Answer 6

This is because an array is a collection of elements of a primitive (or fundamental) data type such as integers, characters or the like.