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This article will explain in detail what is the use of C language enumeration. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article.

What is enumeration

My understanding of enumeration is to give some fixed values-enumerate a name, for example, give a name to 1 called Ture,0, and a name called False,Ture and False both represent the same type of data, for example, both represent logic right or wrong. Here we use the IE interrupt enable register of 51 single-chip microcomputer to give an example.

Second, the use of enumerations

1. Define enumerated values directly, and then assign values to ordinary variables

2. Define an enumeration with a name

3. Define enumerated aliases

# include enum {EX0_ENABLE = 0x01, ET0_ENABLE = 0x02, EX1_ENABLE = 0x04, ET1_ENABLE = 0x08, ES_ENABLE = 0x10, ET2_ENABLE = 0x20, EA_ENABLE = 0x80,}; typedef enum {monday, tuesday, wednesday,} weekday;int main () {unsigned char IEReg; weekday day; IEReg | = ET0_ENABLE; IEReg | = EA_ENABLE; day = monday Printf ("day=%u\ r\ n", day); return 0;} III. What is the use of enumerations and where are they used?

The purpose of enumerations:

By enumerating the total value to flexibly allocate the size of the array, it is convenient to call the required data from the large array.

Name a fixed value as a subscript for array access. When the array is large, such as dozens or hundreds, it's hard to remember what each value means if you represent it from 0 to 100.

The purpose of defining the enumerated fixed value as a certain data type is to improve the readability and professionalism of the code.

Enumerations are similar to define, where define also uses an alias to represent a data, or even a function. However, the value of enum has the function of automatic increment. In addition, enum is a collection of the same type of data. When the project is relatively large, using enumerations to encapsulate data can better achieve modularization.

Fourth, enumerate the places that should be paid attention to

The value of the enumeration is incremented from 0 by default.

The maximum enumeration is 0XFFFFFFFF, which is 4 bytes.

The value in the enumeration does not have to go from small to large. It is incremented by default, or you can set the value yourself.

This is the end of this article on "what is the use of C language enumeration". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

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