typedef in c

1typedef struct
2{
3  	//add different parts of the struct here
4 	string username;
5  	string password;
6}
7user; // name of struct - you can name this whatever
8
9user example; //variable of type user
10
11example.username = "Comfortable Caterpillar"; // username part of example variable
12example.password = "password" // password part of example variable
13  
14if (user.username == "Comfortable Caterpillar")
15{
16	printf("upvote this if it helped!");
17}

1#include <stdio.h>
2#include <string.h>
3 
4typedef struct Books {
5   char title[50];
6   char author[50];
7   char subject[100];
8   int book_id;
9} Book;
10 
11int main( ) {
12
13   Book book;
14 
15   strcpy( book.title, "C Programming");
16   strcpy( book.author, "Nuha Ali"); 
17   strcpy( book.subject, "C Programming Tutorial");
18   book.book_id = 6495407;
19 
20   printf( "Book title : %s\n", book.title);
21   printf( "Book author : %s\n", book.author);
22   printf( "Book subject : %s\n", book.subject);
23   printf( "Book book_id : %d\n", book.book_id);
24
25   return 0;
26}

1// Typedefs can also simplify definitions or declarations for structure pointer types. Consider this:
2
3struct Node {
4    int data;
5    struct Node *nextptr;
6};
7// Using typedef, the above code can be rewritten like this:
8
9typedef struct Node Node;
10
11struct Node {
12    int data;
13    Node *nextptr;
14};

1typedef enum 
2{
3	false,
4    true
5}Bool;

1typedef int tabla1N[N + 1];