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Chapter 11: Problem 37

T F A structure declaration does not define a variable.

Short Answer

Expert verified
# Answer True (T)

Step by step solution

01

Understanding Structure Declaration

A structure declaration is a user-defined data type in C/C++ programming languages, which allows grouping variables of different data types under a single name. It is useful for organizing complex data and representing objects in a program. A structure declaration consists of the keyword 'struct' followed by the structure name and a block enclosed in curly brackets, containing the data member declarations.
02

Examining if Structure Declaration Defines a Variable

A structure declaration by itself only defines a new data type and does not create any instance (variable) of that data type. To define a variable with the structure data type, we must declare it explicitly using the structure name or using a structure variable. In other words, a structure declaration tells the compiler how the new data type should look, but it doesn't create any variable.
03

Example of Structure Declaration and Variable Definition

Consider the following example: ```cpp // Structure declaration struct Point { int x; int y; }; // Variable definition using the structure data type struct Point point1, point2; // or alternatively Point point1, point2; ``` In this example, the structure declaration 'struct Point' only defines a new data type named 'Point', which groups two integer variables 'x' and 'y'. It does not create any variable. The actual variables 'point1' and 'point2' are defined separately using the structure data type 'struct Point'.
04

Conclusion

Based on the analysis, a structure declaration does not directly define a variable. Instead, it defines a new data type that can be later used to create variables of that data type. Hence, the statement in the exercise is True (T).

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Most popular questions from this chapter

T F You may skip members in a structure’s initialization list.

Look at the following statement. enum Color \(\\{\text { RED , ORANGE, GREEN, BLUE }\\}\) A) What is the name of the data type declared by this statement? B) What are the enumerators for this type? C) Write a statement that defines a variable of this type and initializes it with a valid value.

Look at the following code. struct PartData string partName; int idNumber; PartData inventory [100] Write a statement that displays the contents of the partname member of element 49 of the inventory array.

T F An anonymous union has no name.

T F In a union, all the members are stored in different memory locations.
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