By Greg M. Perry
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Extra resources for Absolute Beginner's Guide to Programming (2nd Edition)
The computer is a tool to help you and others do more efficient work than you could do without it. ■ At its most fundamental level, the computer takes input data, processes it, and turns it into meaningful information. ■ To use a computer successfully, people must understand that a computer information system is more than just the hardware. To be successful, the hardware, software, people, data, and procedures must be in place. ■ Without programs, and therefore without programmers who create them, a computer can do nothing.
Note The program that you write is called a source program (or source code). Throughout this book, when you see the term source program, that text is referring to your program before it is compiled into machine-readable code. 30 ABSOLUTE BEGINNER’S GUIDE TO PROGRAMMING, SECOND EDITION The Language Translator Your computer cannot actually understand BASIC, C, Java, or any of the other programming languages. ” you might yell. ” Even so, the computer cannot understand C++ either, but it is easy for a program to translate C++ to the actual 1s and 0s that the computer does understand.
Thanks to computer technology, a computer program is easier to modify than a house. If you leave out a routine that a user wants, you can add it later more easily than a builder can add a room to a finished house. Nevertheless, adding something to a program is never as easy as designing the program correctly the first time. Program maintenance is one of the most time-consuming parts of the programming process. Programs are continually updated to reflect new user needs. If the program is not designed properly before it is written, the user will not want the program until it does exactly what he wants it to do.
Absolute Beginner's Guide to Programming (2nd Edition) by Greg M. Perry