Chapter 9 Creating Value Types with Enumerations and Structs

183

Chapter 9 Quick Reference

To

Do this

Declare an enumeration

Write the keyword enum, followed by the name of the type, followed

by a pair of braces containing a comma-separated list of the

enumeration literal names. For example:

enum Season { Spring, Summer, Fall, Winter }

Declare an enumeration variable

Write the name of the enumeration on the left followed by the name

of the variable, followed by a semicolon. For example:

Season currentSeason;

Assign an enumeration variable

Write the name of the enumeration literal in combination with the

to a value

name of the enumeration to which it belongs. For example:

currentSeason = Spring;

// error

currentSeason = Season.Spring; // correct

Declare a structure type

Write the keyword struct, followed by the name of the structure type,

followed by the body of the structure (the constructors, methods, and

fields). For example:

struct Time

{

public Time(int hh, int mm, int ss)

{ ... }

...

private int hours, minutes, seconds;

}

Declare a structure variable

Write the name of the structure type, followed by the name of the

variable, followed by a semicolon. For example:

Time now;

Initialize a structure variable

Initialize the variable to a structure value created by calling the struc-

to a value

ture constructor. For example: