"C-language summary" struct, union, enumeration

Structure: A collection with a value that cannot be typed
Union: Similar to structure, but sharing a storage space (only one member can be stored at a time)
Enumeration: is a type of shaping

Declaration of struct structure body

Structure Tag Declaration

struct part {    int number;    char name[256];};struct part part1；//不能去掉struct//也可以像下面的方式声明变量struct part {    int number;    char name[256];}part1, part2;

Using the definition of a struct type

//声明part类型的结构体typedefstruct {    int number;    char name[256];}part;part part1;//声明变量

struct as a parameter of a function

//打印结构体void printf_part(struct part p) {    printf("number is %d", p.number);    printf("name is %s", p.name);}

Declaration of an array of structures

struct part parts[100];//声明能装100个part类型变量的数组

Joint

Union and struct-like use, except that each union variable has a common storage space, changing the value of one variable will variable the value of other variables.
Just change the struct to union.

Enumeration

Statement:

enumflag {    false0,    true};

enum {    false,//枚举内的值会默认从0开始    true}flag;

"C-language summary" struct, union, enumeration