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Introduction to Programming in C
Oct 23, 2024
Programming in C Language - Lecture Notes
Introduction to Programming
Purpose of Programming:
Perform computational tasks on computers.
Communicate with computers through instructions.
Why Write Programs?
Computers perform tasks based on sequences of instructions known as
programs
.
Without programs, computers cannot execute any tasks.
Understanding Computer Language
Binary Language:
Computers understand only binary (0s and 1s).
Instructions in natural languages (English, Hindi, etc.) are not understood by computers.
Types of Software
System Programs:
Manage system resources and hardware.
Application Programs:
Used to perform specific tasks (e.g., web browsers, text editors).
Programming Languages
Need for Programming Languages:
Necessary to convert human-readable code into machine language (binary).
Programming languages have syntax and rules for writing programs (e.g., C, C++, Java).
Introduction to C Language
History:
Developed by Dennis Ritchie in 1972 at Bell Laboratories.
Successor to the B language, initially used to write the Unix operating system.
Characteristics of C Language:
System programming language used for writing operating systems, applications, and more.
Popular programming language, standardized by ANSI in 1989 (ANSI C).
Machine Language vs High-Level Language
Machine Language:
Difficult to write and machine-dependent.
Programs written in machine language are not portable across different machines.
High-Level Languages:
Easier to write and understand by humans.
Provide portability, allowing programs to run on different machines with minimal changes.
Compilation Process
Compiler:
Converts C programs into object code (machine code).
C programs have a
.c
extension.
Execution Flow:
Program written in C → Compiled to object code → Executed by CPU.
Conclusion
Next video will cover the execution process of C programs, the role of the linker and loader, and differences between compiler and interpreter.
End of Lecture.
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