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Introduction to C Programming Language

Aug 6, 2024

C Language Introduction

Instructor Introduction

  • Name: Steve Ramallah
  • Experience: 10 years in C and C++ development and training

Overview of C Language

  • Developed by: Dennis Ritchie in 1972
  • Location: AT&T Bell Laboratories, USA
  • Purpose: Used to write computer programs

Examples of Computer Programs

  • Railway Reservation System:
    • Computer program facilitates ticket booking
  • Hospital Patient Registration:
    • Computer used for patient registration
  • Electronic Appliances:
    • Washing machines, microwaves, etc., operate using computer programs.

C Programming Environment

Components Needed for Development

  1. Text Editor:

    • Example: Notepad
    • Purpose: To write the source code.
  2. Compiler:

    • Converts text program into executable code.
    • Examples:
      • Microsoft Visual Studio
      • GNU Compiler

Program Development Process

  • Write code in a text editor
  • Use compiler to convert to executable
  • Commercial compilers provide additional tools for testing and debugging.

Example of a Simple C Program

#include <stdio.h> int main() { printf("Welcome to C\n"); return 0; }

Explanation of the Program

  • #include <stdio.h>:
    • Preprocessor directive that includes the Standard Input Output library.
    • Provides the functionality for printf.
  • int main():
    • Entry point of the program.
    • Contains the execution statements.
  • printf("Welcome to C\n");
    • Function to display the message on the screen.
    • \n is a newline character.
  • return 0;
    • Indicates that the program has executed successfully.

Important Concepts

  • Semicolon:
    • Indicates the end of a statement in C.
  • Function:
    • A set of statements that perform a specific task (e.g., main, printf).
  • Header Files:
    • Contain details about functions used in programs (e.g., stdio.h).
  • Precompiler Directive:
    • Executes before the compilation process starts, allowing for inclusion of header files.