Introduction to C Programming

Problem Solving Through ‘C’

—Learning ‘C’ Programming

• —Syntax
• —Semantics
• —Solving

Block Diagram of Computer

Characteristics

1. —It works on stored program concept
2. —For problem solving computer is used

• —      Automation
•       Handle large volume of data
• —      Speed
• —     Accuracy 

Types of Real World Problems

—In real world applications we come across day to day problems

• —Going to market for shop
• —Solving quadratic equations
• —Matrix Operation: Add, Multiply…
• —ATM
• —Grade calculation
• —Railway/Flight Reservation
• —Library Automation
• —Many More.....

Approach to Problem Solving

• —Define and Identify the Problem
• —Analyze the Problem
• —Identifying Possible Solutions
• —Selecting the Best Solutions
• —Specifications
• —Algorithm
• —Coding
• —Testing
• —Maintenance

—Algorithm/Flowchart:

• —An algorithm is a sequence of instructions often used for solving problem
• —A flowchart is a schematic representation of an algorithm 

—Coding:

• —Set of instructions for solving a problem

—Testing:

• —Finding the errors in the code for possible values
• —Like taking a=0 gives unambiguous results

—

—Maintenance:

• —Modification due to requirements change
• —Scalability

Introduction to Algorithms

• —Step by step method to solve a problem
• —Must include ALL required information

Flowcharts

More About High Level Languages

• —The languages are designed keeping in mind features of portability
• —
• —The languages are machine independent
• —
• —Easy to write and understand
• —
• —The programmer pays whole attention logic of the program

Translators

—For translating high level and low level language to machine language

• —Assembler:  Assembly Level -->   Machine Level
• —Interpreter

1. —High Level --> Machine Level
2. —Interpreter searches the error statement by statement

• —Compiler

1. —High Level   --> Machine Level
2. —Compiler searches all errors in the code and lists them

Some High Level Languages

• —BASIC
• —FORTRAN
• —PASCAL
• —COBOL
• —C
• —C++
• —Java

C

• —Developed at AT&T Laboratory of USA
• —Year: 1970
• —Created By: Dennis Ritchie

Why C?

• —A basic foundation for learning programming language elements
• —Major parts of popular OS like windows, Linux, Unix are written in C—
• —Embedded System Programs are written in C

1. —Microwave Oven
2. —Washing machines
3. —Digital Cameras

• —C provides several language elements that makes interaction with hardware—
• —Several Gaming programs are also developed in C

Compiling C Program - Linux

—Writing the code

• —vi hello.c
• —insert data (i)
• —save changes (Keys: esc:wq)

—cc hello.c

—The compiler generates an executable

• —a.out

—Type ./a.out

—Output

• Hello World

See You..in The next Post with very basic of C Programming