C Language Basics Tutorial (iv) Pointers, structures, unions, and enumerations (11)

3. Structure array and structure pointers
Structs are a new type of data, and can also have structure arrays and structure pointers.
An array of structures
An array of structures is a collection of variables with the same struct type. If you want to define the name, sex, age, and address of 40 students in a class, you can define an array of structures. As shown below:
struct{
Char Name[8];
Char sex[2];
int age;
Char addr[40];
}STUDENT[40];
can also be defined as:
struct string{
Char Name[8];
Char sex[2];
int age;
Char addr[40];
};
struct string student[40];
It is necessary to point out that the access of a struct array member is a structural variable of an array element in the form of:
Structure array element. Member name
For example:
Student[0].name
Student[30].age
In fact, the structure array is equivalent to a two-dimensional construct, the first dimension is a structure array element, each element is a structural variable, and the second dimension is a struct member.
Attention:
A member of a struct array can also be an array variable.
For example:
struct A
{
int m[3][5];
float F;
Char s[20];
}Y[4];
In order to access this variable of struct variable y[2] in structure A, it can be written as
Y[2].M[1][4]