Tech Faqs

Tag: C programming, storage classes, variables

  • Understanding the Different Types of Storage Classes in C

    Introduction

    Storage classes in C determine the scope, lifetime, visibility, and memory location of variables. Understanding these is crucial for optimizing your C programs…

    Types of Storage Classes

    • auto: The default storage class for local variables.
    • register: Suggests storing the variable in a CPU register for faster access.
    • static: Maintains the variable’s value between function calls.
    • extern: Declares a global variable accessible across multiple files.

    Examples

    Here’s a practical example of a static variable:

    void count() {
    static int counter = 0;
    counter++;
    printf("Counter: %dn", counter);
}

    Calling count() multiple times will show the value of counter persisting across calls.