C language----Structure--declaration and definition

Try to write something, mainly to consolidate what you have learned.

The structure of the body? The structure of C language is mainly used to express, define some of the types you want, such as date, identity information and so on.

Date: 2017-09-10

Identity information: Name Fakke, age 23, height 180;

Can be implemented through structs. (Personal feeling a bit like a python dictionary)

Define the way:

First step: Declare the struct type:

struct type name {

Variable type 1 variable name;

Variable type 2 variable name;

。。。

Variable type 3 variable name;

};

Step Two:

2 Defining a new variable
struct date variable name;

Step Three:

Variable Assignment initial value
struct Date today = {07,12,2017};
struct Date today = {. month=01,.year=2012};
Two assignment methods, no default 0 specified, such as an array.

There are two ways to declare data types, of course.

One is:

struct {

}P1,P2;
P1,P2 is the two variable of this nameless type, which you might just need to use, without having to declare a data type.

The other is:

struct Point {

}P1,P2;
This method of declaring the data type, while doing two things, one is declaring one type, and the other is creating two variables.

C language----Structure--declaration and definition