Computer Programming

COMPUTER PROGRAMMING LECTURE NOTES Year : Subject Code : ACS001 Regulations : R16 Class : I B.Tech Branch : CSE/ ECE/ IT/ EEE Team of Instructors : Dr. K Srinivasa Reddy, Professor, CSE, Dr. G Ramu, Professor, CSE, Ms. B Padmaja, Associate Professor, CSE, Ms. P. Ila Chandana Kumari, Associate Professor, IT, Ms. K. Laxmi Narayanamma, Associate Professor, IT, Ms. B Rekha, Assistant Professor, IT Prepared By : Ms. P. Ila Chandana Kumari, Associate Professor, IT INSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad - 500 043 2 UNIT-I INTRODUCTION TO COMPUTERS COMPUTER SYSTEMS ―A Computer is an electronic device that stores, manipulates and retrieves the data.‖ We can also refer computer computes the information supplied to it and generates data. A System is a group of several objects with a process. For Example: Educational System involves teacher, students (objects). Teacher teaches subject to students i.e., teaching (process). Similarly a computer system can have objects and process. The following are the objects of computer System a) User ( A person who uses the computer) b) Hardware c) Software Hardware: Hardware of a computer system can be referred as anything which we can touch and feel. Example : Keyboard and Mouse. The hardware of a computer system can be classified as Input Devices(I/P) Processing Devices (CPU) Output Devices(O/P) ALU: It performs the Arithmetic and Logical Operations such as +,-,*,/ (Arithmetic Operators) &&, || ( Logical Operators) CU: Every Operation such as storing , computing and retrieving the data should be governed by the control unit.