about struct and typedef structs

To

1 struct   telphone{23            char name[]; 4 5            Char  teinumber[]; 6 };

As an example, we first define a telphone structure.

Join needs to define an alias for Telphone:

Its syntax is

typedef  Telphone  TP;

And actually telphone as a struct,

It's better to write like this

Tepedef struck Telphone TP;

Because our telphone is our custom type, so we understand, but others do not necessarily understand, if we add struck this keyword, others will know that this is a custom type, and will not be confusing.

So it eventually evolved into

The following wording

struct telphone{             char    name[];              Char    telnumber[];} TP;

At this point, we can define

OK

struct Telphone TP1;

can also, directly

TP TP2;

If we don't need struct telphone, we can also directly

struct {             char    name[];              Char    telnumber[];} TP;

This allows the structure to be defined only by TP.

The difference in C + +

If we define the

1 struct   telphone{2            char name[]; 3           Char  teinumber[]; 4  };

Then you can directly view the same telphone to define the structure variables.

Telphone TP1;

In C + +

　　　　struct　　　　   Student   {   　　　　int   A;   }STU1; // STU1 is a variable  

STU1 represents a struct variable of type student

and

typedef   struct   Student2   {   　　　　int   A;   } STU2; // STU2 is a struct type =struct Student  

There is no difference in the C language.

about struct and typedef structs