What is an enumeration? Please tell me what enumeration means

1.Enumeration A special form of a value type that inherits from and provides an alternate name for the value of the base primitive type. An enumeration type has a name, a base type, and a set of fields.

The base type must be a built-in signed (or unsigned) integer type (such as byte, int32, or uint64). Fields are static text fields, and each of them represents a constant. The language used assigns a specific value of the underlying type to each field.

2.An enum is a set of named integer constants, and enums are common in everyday life. For example, sunday, monday, tuesday, wednesday, thursday, friday, saturday, which represent the week, is an enumeration.

The description of an enumeration is similar to that of a structure and a union, and it is in the form of: enum enumeration name enumeration variables; If the enum is not initialized, it is omitted"= integer constant", starting with the first identifier and then assigning identifiers 0, 1, 2, ., in turnHowever, when a member in the enumeration is assigned, the following members determine their values according to the rule of adding 1 in order.

For example, after the following enumeration, the values of x1, x2, x3, and x4 are 0, 1, 2, and 3, respectively. enum numx;When the definition is changed to: enum num x; then x1=0, x2=0, x3=50, x4=51 Note:

1.The end of each member (identifier) in the enumeration is",", it's not";", the last member can be omitted","。 2.

Negative numbers can be assigned during initialization, and subsequent identifiers are still added by 1 in turn. 3.An enumerated variable can only take an identifier constant in the enumeration description structure.

For example: enum num ; enum strig x=x3;At this point, the enumerated variable x is actually 7. 3.

Enumeration (pascal) With the increasing popularity of computers, programs are not only used for numerical calculations, but also more widely for processing non-numerical data. For example, gender, month, day of the week, color, company name, education, occupation, etc., are not numerical data.

In other programming languages, a numerical value is used to represent a certain state, which is not intuitive and has poor legibility. If a state can be represented in a program with words that have corresponding meanings in natural language, the program will be easy to read and understand. That is to say, considering the possible value of a variable in advance, and trying to represent each of its values with words with clear meaning in natural language, this method is called the enumeration method, and the type defined in this method is called the enumeration type. ]

An enum is a set of named integer constants, and enumerations are common in everyday life. For example, sunday, monday, tuesday, wednesday, thursday, friday, saturday, which represent the week, is an enumeration. ]

Enumeration is to enumerate all the cases one by one, so the value can only be one of these cases, not anything else. ]

What enumeration: too many to enumerate, not to mention to enumerate, not to enumerate, etc.

1. The list goes on: sheng (old reading shēng), exhaustion. pcs, pcs. It's impossible to list them all. There are many people or things that describe the same kind.

2. To enumerate: too many to mention; The number is too numerous to list them all.

3. Non-enumerable: There are so many descriptions that it is impossible to calculate.

Related example sentences. 1. In addition to the stars of the Milky Way, there are countless stars in the extragalactic galaxy, which is really too numerous to mention.

2. However, in general, there have been many studies on the theory and practice of new rural construction, and there are countless literatures on the logistics of modern agricultural products, but it is rare to combine the two.

3. In the face of such a high tax rate, no matter which enterprise in China can not afford it, many enterprises have to withdraw from the market share they have occupied, and some have even been completely expelled from the original market, there are countless such cases.

4. In the exhibition hall, from the work boots worn by oil workers to the offshore oil drill tower, there are many kinds of products.

5. There are countless people who make money without hard work, but there are only those who squander without hard work.

6. In the history of our country, whenever the country and the nation are in a critical moment of survival, Muslims have stepped forward, are not afraid of bloodshed and sacrifice, and have served the country with countless heroic deeds.

Explanation of enumeration.

enumerate]

List them one by one Explain them in detail One by one. "Preface to the Biography of Northern History: Enxing": During this period, there were many people who stole officials and sold their lords, and there were many people who insulted the palace, and they could not be enumerated.

Shu Wuyi" "It is in Zujia, the king of injustice" Song Cai Shen Ji biography: "The following Zhou Gongyan is from King Yin Zhongzong and Gaozong and Zujia and I King Wen of Zhou. and the clouds, because of their order and enumeration of words.

Qing Li Yu "Idle Love, Lyrics, Music, and Structure": There are so many of them that they cannot be enumerated. ”

Word decomposition Explanation of the piece Piece é trunk: cut its strips. In ancient times, the equipment used to prevent the noise of the soldiers during the march was like a chopstick, and it was held in the mouth

It is also like a soldier who goes to the enemy, and walks quickly, not hearing orders, but hearing the sound of the forest with men and horses." Horsewhip: in the number of pieces (?

Closed (pointing to the door with a horsewhip). The quantifier, equivalent to "個", is mostly used to explain lift (lift) ǔ to lift up, to lift up: to lift the head.

Hands. Weightlifting. Indecisive.

Action Behavior: Manners. Easy.

Initiate, set up: raise righteousness. Held.

Initiative. Present: Raise the essentials.

Example. Elected, Qiao Chun shirt recommendation: Recommended.

Recommendations. Quan: The whole country.

All over the world. Family. Ancient fingers.

The explanation of the word enumeration is: enumeration méijǔ. (1) List them one by one.

The explanation of the word enumeration is: enumeration méijǔ. (1) List them one by one. The structure is: piece (left and right structure) lift (upper and lower structure). The phonetic pronunciation is: Pinyin is: méijǔ.

What is the specific explanation of enumeration, we will introduce it to you through the following aspects:

1. Citations and explanations [click here to view the details of the plan].

List them all. Quoting from the "Preface to the Biography of Northern History: Enxing": "During this period, there were many people who stole officials and sold their lords, and insulted the palace.

Shu Wuyi" "Its Kuanzai is in Zujia, the unrighteous only king" Song Cai Shen Ji biography: "The following Zhou Gongyan is from King Yin Zhongzong and Gaozong to make trouble and Zujia and I King Wen of Zhou. and the clouds, because of their order and enumeration of words.

Qing Li Yu "Idle Love, Lyrics, Music, and Structure": There are so many of them that they cannot be enumerated. ”

2. Chinese dictionary.

List them all. For example, with the advancement of science and technology, there are countless new products invented every day all over the world. 」

3. Network Explanation.

EnumerationIn mathematical and computer science theories, an enumeration of a set is a program that lists all the members of some set of infinite sequences, or a count of objects of a particular type. The two types often (but not always) overlap. is a set of named integer constants, and enumerations are common in everyday life, such as sunday, monday, tuesday, wednesday, thursday, friday, and saturday, which represent the day of the week.

Synonyms about enumeration.

List and list. Antonyms about enumeration.

Conceal. Verses about enumeration.

Enumerating the number of pieces asks the old can enumerate the thousand autumns and the victory is difficult to enumerate.

Words about enumeration.

enumerate

Idioms about enumeration.

The horse work is fast guessing, the order is too loud to lift, the mountain is lifted, the top is lifted, and the horse work is the first rank.

Words about enumeration.

The horse is late, the title is fast, the mountain is raised, the pincer is raised, the horse is rolled, the title is soaring, the power is raised, the guess is made, the oil paper is fast, the horse is fast.

Sentence formation about enumeration.

1. There are countless people who have done good deeds without leaving a name.

2. Since the launch of the activity of learning from Lei Feng, good people and good deeds in the school have emerged in an endless stream, and the list is endless.

3. The motherland has beautiful scenery and countless places of interest and historic sites.

4. His helpful deeds are numerous.

5. Since the liberation, our publishing house has produced countless high-quality books, which have had a wide impact on the majority of readers.

The enumeration type is actually an integer, and its function is to make the value look more intuitive, and to delineate a range, in which the value is confined to it.

1. If you need several possible values for a variable, then it can be defined as an enumeration type. The reason why it is called enumeration is to enumerate the possible situations of variables or objects, which can also be said to be possible values.

2. Let's take an example to illustrate, in order to make everyone more clear, for example, there is a pen in a pencil case, but you don't know what kind of pen it is before you open it, it may be a pencil or a fountain pen, there are two possibilities, then you can define an enumeration type to represent it!

enum box;Here you define an enumeration type variable called box, which contains two elements, also called enumeration elements, here pencil and pen, which represent pencil and pen, respectively.

3. I want to say here that if you want to define two variables with the same feature enumeration type, then you can define them in the following two ways!

enum box;

enum box box2;Or abbreviated as box box2;

The other is to define it at the time of declaration.

enum box,box2;Define while declaring!

The enumeration element system in the enumerated variables is treated according to constants, so it is called enumeration constants, and they cannot be assigned by ordinary arithmetic, (pencil=1; That's wrong, but you can assign a value when you declare it!

enum box;

4. But one thing to pay special attention to here is that if you don't do the element assignment operation, then the element will be automatically incremented by the system from 0 to the automatic assignment operation, when it comes to automatic assignment, if you only define the first one, then the system will add 1 to the value of the previous element for the next element, for example.

enum box;Here pen is 4, and the system will automatically assign the definition of pen=4.