Mastering C++: A Comprehensive Quiz Based on 'Thinking in C++

Question: 1 / 565

What does the declaration 'struct X;' represent in C++?

A complete definition of a structure

An incomplete type specification

This declaration represents an incomplete type specification. This means that the structure named X is declared but it does not contain any data members or member functions.In option A, declaring a complete definition would require specifying the data members and functions within the structure. Option C and D are incorrect because neither initialization of a structure nor declaration of an object is accomplished by writing 'struct X;'.

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Initialization of an X structure

Declaration of an X object

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