How is the struct used in the C programming language?

In the C language, “struct” is a keyword used to create custom data types. It allows us to combine variables of different types together to represent a more complex data structure. The usage of “struct” includes: 1. Declaring a struct type: Before using “struct,” it is necessary to declare a struct type by defining its member variables and types. For example:

  struct Person {
       char name[20];
       int age;
       float height;
   };

2. Creating struct variables: After declaring a struct type, you can create struct variables using that type. For example:

  struct Person person1;

Accessing struct members: You can use the “dot” operator to access the member variables of a struct. For example:

  strcpy(person1.name, "John");
   person1.age = 25;
   person1.height = 1.75;

4. Simplifying struct declarations using typedef: The typedef keyword can be used to give a new name to a struct type, making it easier to use in the future. For example:

  typedef struct {
       char name[20];
       int age;
       float height;
   } Person;

This way, in subsequent usage, we can directly use “Person” as the type name, without needing to add the “struct” keyword. Using “struct” can easily organize and manipulate a group of related data, making the code more readable and maintainable. We can use “struct” to represent complex data structures, such as linked lists, trees, etc.