C Language Basic to Advance Course > Preprocessors and Header Files

Preprocessors and Header Files

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Source code contains preprocessor directives. There are numerous instructions to choose from. #include is one of them, and it's used to include a header file. Header files contain declarations, most commonly for functions and types (and occasionally variables) present in a library.

A preprocessor (or precompiler) in computer science is a programme that processes its input data to produce output that can be used as input by another programme. The output is a preprocessed version of the input data that is frequently used by other programmes, such as compilers.

For the computer programming languages C, Objective-C, and C++, the C preprocessor is the macro preprocessor. Header files, macro expansions, conditional compilation, and line control are all available through the preprocessor.

Header files have two functions. The interfaces to portions of the operating system are declared in system header files. They are included in your programme to provide the definitions and declarations required to call system calls and libraries.

The Standard C Library has 19 header files. The. h file extension is used for all files.

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  1. Introduction to C Programming
    24m 32s
  2. How to use LearnVern
    3m 20s
  3. Assignment : Introduction to C
    3m 17s

  1. Setting up C Environment
    17m 24s
  2. First Program in C
    25m 16s
  3. Assignment : Setting up C & First Program on C
    3m 50s

  1. Basic Syntax
    21m 44s
  2. Data Types in C Programming
    26m 19s
  3. Assignment : Structure of C
    7m 38s
  4. Variables in C Programming
    20m 35s
  5. Storage Classes in C Programming
    28m 23s
  6. printf() and scanf() Functions
    22m 56s
  7. Constants in C Programming
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  1. Operators in C Programming
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  2. Assignment : Operators in C
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  1. Decision Making- If Statement, If-else Statement
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  1. Introduction to User Defined Functions
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  3. User Defined Functions - Functions and Parameters
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  4. User Defined Functions- Types of Parameters
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  5. Scope of a Variable
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  6. Assignment : Working with User Defined Functions 1
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  1. Declaration & Initialization of Arrays
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  2. Accessing Array Elements
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  3. Types of Arrays
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  4. 2D Arrays
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  6. Introduction to Pointers
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  11. Working with Strings
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  12. Introduction to Structures
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  13. Basic Structure Example
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  14. Nested Structures, Array of Structures
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  15. Union in C Programming
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  1. Typedef Function in C Programming
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  2. Assignment : Typedef Function
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  1. Overview of File Handling
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  2. Reading and Writing to Files
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  5. Bit Fields
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  6. File Input/Output Functions -I
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  1. Preprocessors and Header Files
    8m 29s
  2. Assignment : Preprocessors and Header Files
    3m 14s

  1. Type Casting
    8m 24s
  2. Assignment : Type Casting
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  1. Error Solving in C
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  1. Recursive Functions in C
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  1. Variable Arguments in User Defined Functioncs
    20m 2s
  2. Assignment : Variable Arguments in User Defined Functions
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  1. Memory Management
    11m 34s
  2. Assignment : Memory Management
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  1. Command Line Arguments
    9m 12s
  2. Assignment : Command Line Arguments
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  1. Inbuilt Library Functions- Math.h Library
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  2. Inbuilt Library Functions- String.h Library, Time.h Library
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  3. Assignment : C Programming Libraries
    4m 31s

  1. Running and Debugging programs in C
    19m 18s
  2. Assignment : Running and Debugging Programs
    3m 41s

  1. Compilation and Execution
    15m 53s
  2. Assignment : Compilation and Execution
    2m 59s

  1. Advanced C Features: Macros
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  2. Advanced C Features: Linked List
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  1. Printing a String
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  10. Printing Array Elements and Addresses using Pointers
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  11. Structure for Student Data
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  12. Read and Write Data in a File
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  1. Course Summary
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  1. Interview Question
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  1. Career Guideline
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