The best C typedef Tutorial In 2024, In this tutorial you can learn typedef vs #define,
C language provides atypedef keywords, you can use it to take a new name for the type.The following example defines a termBYTE is a single byte numbers:
typedef unsigned char BYTE;
After this type definition, it can be used as an identifier BYTEunsigned char type abbreviation, such as:
BYTE b1, b2;
By convention, the definition will be capitalized letters in order to alert the user to type a symbolic name is an abbreviation, but you can also use lowercase letters, as follows:
typedef unsigned char byte;
You can also usetypedef to custom data types to take a new name for the user.For example, you can use the structure typedef to define a new data type, and then use this new data type to define the structure of direct variables, as follows:
#include <stdio.h> #include <string.h> typedef struct Books { char title[50]; char author[50]; char subject[100]; int book_id; } Book; int main( ) { Book book; strcpy( book.title, "C Programming"); strcpy( book.author, "Nuha Ali"); strcpy( book.subject, "C Programming Tutorial"); book.book_id = 6495407; printf( "Book title : %s\n", book.title); printf( "Book author : %s\n", book.author); printf( "Book subject : %s\n", book.subject); printf( "Book book_id : %d\n", book.book_id); return 0; }
When the above code is compiled and executed, it produces the following results:
Book title : C Programming Book author : Nuha Ali Book subject : C Programming Tutorial Book book_id : 6495407
C#define directive is used to define an alias for a variety of data types, and typedefsimilar, but they have the following differences:
Here is the simplest use of #define:
#include <stdio.h> #define TRUE 1 #define FALSE 0 int main( ) { printf( "Value of TRUE : %d\n", TRUE); printf( "Value of FALSE : %d\n", FALSE); return 0; }
When the above code is compiled and executed, it produces the following results:
Value of TRUE : 1 Value of FALSE : 0