3. File Encryption and Decryption Write a program that uses a dictionary to assign "codes" to each letter of the alphabet. For example: 'a' : '9', 'B' : '@', 'b': '#', etc...} Using this example, the letter A would be assigned the symbol %, the letter a would be assigned the number 9, the letter B would be assigned the symbol e, and so forth. codes = { 'A' : The program should open a specified text file, read its contents, then use the dictionary to write an encrypted version of the file's contents to a second file. Each character in the second file should contain the code for the corresponding character in the first file. Write a second program that opens an encrypted file and displays its decrypted on the screen. contents

3. File Encryption and Decryption Write a program that uses a dictionary to assign "codes" to each letter of the alphabet. For example: 'a' : '9', 'B' : '@', 'b': '#', etc...} Using this example, the letter A would be assigned the symbol %, the letter a would be assigned the number 9, the letter B would be assigned the symbol e, and so forth. codes = { 'A' : The program should open a specified text file, read its contents, then use the dictionary to write an encrypted version of the file's contents to a second file. Each character in the second file should contain the code for the corresponding character in the first file. Write a second program that opens an encrypted file and displays its decrypted on the screen. contents

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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This question is Chapter 9 programming exercise question 3.

program
user
tals as values. (Use the
Internet to get a list of the states and their capitals.) The
a creates a the states as cap
should then randomly quiz the user by displaying the name of a state and asking the
to enter that state's capital. The program should keep a count of the number of correct anter
incorrect responses. (As an alternative to the U.S. states,
the program can use the names of
countries and their capitals.)
3. File Encryption and Decryption
Write a program that uses a dictionary to assign "codes" to each letter of the alphabet. For
example:
codes = { 'A' : '%', 'a : '9', 'B' : '@', 'b': '#', etc...}
Using this example, the letter A would be assigned the symbol %, the letter a would be
assigned the number 9, the letter B would be assigned the symbol e, and so forth.
The program should open a specified text file, read its contents, then use the dictionary
to write an encrypted version of the file's contents to a second file. Each character in the
second file should contain the code for the corresponding character in the first file.
Write a second program that opens an encrypted file and displays its decrypted
contents
on the screen.
4. Unique Words
Write a program that opens a specified text file then displays a list of all the unique words
found in the file.
Hint: Store each word as an element of a

Process by which instructions are given to a computer, software program, or application using code.

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