Starting Out with Programming Logic and Design (4th Edition)
4th Edition
ISBN: 9780133985078
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 12, Problem 11PE
File Decryption Filter
Design a program that decrypts the file produced by the program in
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Prog 1. File Encryption: File encryption is the science of writing the contents of a file in a secret code. Your encryption program should work like a filter reading the contents of one file, modifying each character in the input file into a code, and then writing the coded characters out to a second file. The second file will be a version of the first file but written in a secret code.
In Notepad or something similar, you will create a file with text in it. It should be several lines long. Your program should read the file character by character and make some change to the character before writing that character to a second new encrypted file. See program 13-8 to see how to read and write one character at a time.
You may come up with an encryption technique of your own or use something simple like adding 10 to the ASCII code of each character in the file before it is written to the second file.
Disc Scheduling FCFS, SCAN or C-SCAN
Write a program that will calculate the total head movement for either one of this algorithms (FCFS, SCAN or C-SCAN) for all test cases
Your input file starts with the case number, number of tracks, starting track, and the sequence of track numbers it will be accessing//input fileCase 1, 199, 53, 98, 183, 37, 122, 14, 124, 65, 67Case 2, 199, 53, 98, 183, 37, 122, 14, 124, 65, 68Case 3, 199, 53, 98, 183, 37, 122, 14, 124, 65, 69Case 4, 199, 53, 98, 183, 37, 122, 14, 124, 65, 70
Remember the track starts at 0
A sample output file will look like the following. FCFS algorithmCase 1, 640Case 2, 641Case 3, 642Case 4, 643
Computers Science
File System Interface
Some of the systems automatically open a file when it is referenced for the first time and close the file when the job terminates. Discuss the advantages and disadvantages of this scheme compared with the more traditional one where the user has to open and close the file explicitly.
Chapter 12 Solutions
Starting Out with Programming Logic and Design (4th Edition)
Ch. 12.2 - Prob. 12.1CPCh. 12.2 - Prob. 12.2CPCh. 12.2 - Design an algorithm that determines whether the...Ch. 12.2 - Design an algorithm that determines whether the...Ch. 12.2 - Prob. 12.5CPCh. 12.2 - Prob. 12.6CPCh. 12 - Prob. 1MCCh. 12 - Prob. 2MCCh. 12 - If the str variable contains the string "berry",...Ch. 12 - If the str variable contains the string "Redmond",...
Ch. 12 - Prob. 5MCCh. 12 - Prob. 1TFCh. 12 - Prob. 2TFCh. 12 - If the String variable str contains the string...Ch. 12 - The insert library module automatically expands...Ch. 12 - Prob. 5TFCh. 12 - Prob. 6TFCh. 12 - Prob. 7TFCh. 12 - Prob. 1SACh. 12 - If the following pseudocode were an actual...Ch. 12 - Prob. 3SACh. 12 - Prob. 4SACh. 12 - Prob. 5SACh. 12 - Design an algorithm that counts the number of...Ch. 12 - Prob. 2AWCh. 12 - Design an algorithm that counts the number of...Ch. 12 - Design an algorithm that deletes the first and...Ch. 12 - Design an algorithm that converts each occurrence...Ch. 12 - Design an algorithm that replaces each occurrence...Ch. 12 - Assume the following declaration exists in a...Ch. 12 - Prob. 1DECh. 12 - Prob. 2DECh. 12 - Prob. 3DECh. 12 - Prob. 1PECh. 12 - Sentence Capitalizer Design a program that prompts...Ch. 12 - Prob. 3PECh. 12 - Sum of Digits in a String Design a program that...Ch. 12 - Prob. 5PECh. 12 - Alphabetic Telephone Number Translator Many...Ch. 12 - Word Separator Design a program that accepts as...Ch. 12 - Pig Latin Design a program that reads a sentence...Ch. 12 - Prob. 9PECh. 12 - File Encryption File encryption is the science of...Ch. 12 - File Decryption Filter Design a program that...
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- (Data processing) a. Write a C++ program that opens a file and displays its contents with line numbers. That is, the program should print the number 1 before displaying the first line, print the number 2 before displaying the second line, and so on for each line in the file. b. Modify the program written in Exercise 6a to list the file’s contents on the printer assigned to your computer.arrow_forwardIn order for a software to make use of a file, it must perform three stages.arrow_forwardTrue or False The term read file is used to describe a file that data is read from.arrow_forward
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