typedef interpretation is performed by the compiler whereas #define statements are processed by the pre-processor. Using 'typedef', we cannot create a new datatype but define a new name for already existing type. In C, the pointer nature of the reference is explicit. We have many cases wherein the use of typedef is useful at some point of pointer declaration. Typedef in C - javatpoint typedef struct coordinate { int x; int y; } struct coordinate cornerA . How to access the pointer to structure in C language? typedef is used to give an alias name to another data type. In C (not C++), you have to declare struct variables like: struct myStruct myVariable; In order to be able to use myStruct myVariable; instead, you can typedef the struct: typedef struct myStruct someStruct; someStruct myVariable; You can combine struct definition and typedefs it in a single statement which declares an anonymous . Note, the code you show shouldn't compile correctly unless you add struct before x *a; and y *b;. . Pointers and Structures in C - Scaler Topics C++ Pointers and Structures - CodesCracker The typedef keyword in the C programming language allows users to give alternate names to primitive (e.g., int) and user-defined (e.g., struct) data types. Previous parts of the Getting Started with Programming series: Part 1: Skimming the Surface. Examples of typedef in C. Below given are the practical examples of typedef: Example #1 - Typdef unsigned int ui; Code: StructTypedef.c. You will also learn to dynamically allocate memory of struct types. typedef struct bill { float amount; int id; char address[100]; }each_bill; int main(){ each_bill p1 . In C, you can also create your own data type. C++ structures, typedef and unions - CodingUnit C Typedef with Examples The C programming language supports various keywords and data types. The -> operator dereferences the pointer to the left operand and later accesses the value of a member of the right operand. Pointers to Structures - The Basics of C Programming | HowStuffWorks The declarator becomes a new type. typedef - Wikipedia We use structures to overcome the drawback of arrays. C Language Tutorial => Dereferencing a Pointer to a struct Typedef is type definitions make code more readable by giving application-specific names to types. C Tutorial - structures, unions, typedef. To my taste, the easiest and clearest way is to do forward declarations of the struct and typedef to the struct and the pointer: typedef struct node node; typedef node * node_ptr; struct node { int data; node_ptr nextptr; }; Though I'd say that I don't like pointer typedef too much. C typedef - W3schools Typedef. During your programming experience you may feel the need to define your own type of data. Step 1: First, you need to declare and aliasing the function pointer as per requirements. Note, the code you show shouldn't compile correctly unless you add struct before x *a; and y *b;. c - How to access a pointer of struct in a struct using a function ... There are two ways in which we can access the value (i.e address) of ptr_mem: Using structure variable - t1.ptr_mem. Typedef and Structures in C Programming.