In this assignment you will write a program that encrypts a text file. You will use the following encryption scheme. 1. Ask the user for the name of the original file. 2. Ask the user for the name of the output file. 3. Ask the user for the encryption key, n. 4. Read n² characters from the file into the n rows and n columns of a 2-dimensional array row by row. 5. Write the characters from the array to an output file column by column. 6. Repeat steps 4-6 until the entire input file has been read. This same program can be used to decrypt a file that has been encrypted in this way. Your program should have functions for performing the following tasks. 1) Reading the characters from the file into the array. This function should be passed the file stream, the array and the key. 2) Writing the characters from the array to the file. This function should be passed the file stream, the array and the key. Your main function should get the filenames, open the files, get the key, dynamically allocate the memory for the array, and close the files. Your program should also: Give detailed directions and warnings to the user. Be readable with appropriate documentation and formatting. (Be sure to include carefully written pre and post conditions for each of your functions)
In this assignment you will write a program that encrypts a text file. You will use the following encryption scheme. 1. Ask the user for the name of the original file. 2. Ask the user for the name of the output file. 3. Ask the user for the encryption key, n. 4. Read n² characters from the file into the n rows and n columns of a 2-dimensional array row by row. 5. Write the characters from the array to an output file column by column. 6. Repeat steps 4-6 until the entire input file has been read. This same program can be used to decrypt a file that has been encrypted in this way. Your program should have functions for performing the following tasks. 1) Reading the characters from the file into the array. This function should be passed the file stream, the array and the key. 2) Writing the characters from the array to the file. This function should be passed the file stream, the array and the key. Your main function should get the filenames, open the files, get the key, dynamically allocate the memory for the array, and close the files. Your program should also: Give detailed directions and warnings to the user. Be readable with appropriate documentation and formatting. (Be sure to include carefully written pre and post conditions for each of your functions)
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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Transcribed Image Text:In this assignment you will write a program that encrypts a text file. You will use the following
encryption scheme.
1. Ask the user for the name of the original file.
2. Ask the user for the name of the output file.
3. Ask the user for the encryption key, n.
4. Read n² characters from the file into the n rows and n columns of a 2-dimensional array
row by row.
5. Write the characters from the array to an output file column by column.
6. Repeat steps 4-6 until the entire input file has been read.
This same program can be used to decrypt a file that has been encrypted in this way.
Your program should have functions for performing the following tasks.
1) Reading the characters from the file into the array. This function should be passed the
file stream, the array and the key.
2) Writing the characters from the array to the file. This function should be passed the file
stream, the array and the key.
Your main function should get the filenames, open the files, get the key, dynamically allocate the
memory for the array, and close the files.
Your program should also:
Give detailed directions and warnings to the user.
Be readable with appropriate documentation and formatting. (Be sure to include
carefully written pre and post conditions for each of your functions.)
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