I\'m required to select at least one sorting method that we have not coded in th
ID: 3591905 • Letter: I
Question
I'm required to select at least one sorting method that we have not coded in the class and another one we did. (But you could also do two new methods.) Make sure that both of the methods work correctly. Show the testing results for each of the two methods using a randomly created integer array of 50 elements. (B) Write a C# main program to compare the time spans for running 1,000 times on both sorting methods for randomly created 1,000 integers ranging from 100 to 1000. Refer to the class Google site for information. Document to be submitted =================C# code and testing result for Sort Method individual C# main program includes only Sort One on 50-element array =================C# code and testing result for Sort Method Two================= individual C# main program includes Only Sort Two on 50-element array =================C# code and running time spans for the two methods ================== Include both Sorting methods in the program and run 1,000 times on 1000-element array
Explanation / Answer
Many people create files using a text editor, but you can use the command cat to create files without using/learning to use a text editor. To create a practice file (called firstfile) and enter one line of text in it, type the following at the % prompt:
cat > firstfile
(Press the Enter/Return key.)
This is just a test.
(Press the Enter/Return key.)
Terminate file entry by typing Control-d on a line by itself. (Hold down the Control key and type d.) On your screen, you will see:
% cat > firstfile
This is just a test.
^D
To examine the contents of a file you have just created, enter this at the % prompt:
cat firstfile
Copying a File
To make a duplicate copy of a file, use the command cp. For example, to create an exact copy of the file called firstfile, you would type:
cp firstfile secondfile
This results in two files with different names, each containing the same information. The cp command works by overwriting information. If you create a different file called thirdfile and then type the following command:
cp thirdfile firstfile
you will find that the original contents of firstfile are gone, replaced by the contents of thirdfile.
Renaming a File
Unix does not have a command specifically for renaming files. Instead, the mv command is used both to change the name of a file and to move a file into a different directory.
To change the name of a file, use the following command format (where thirdfile and file3 are sample file names):
mv thirdfile file3
This command results in the complete removal of thirdfile, but a new file called file3 contains the previous contents of thirdfile.
Like cp, the mv command also overwrites existing files. For example, if you have two files, fourthfile and secondfile, and you type the command
mv fourthfile secondfile
mv will remove the original contents of secondfile and replace them with the contents of fourthfile. As a result, fourthfile is renamed secondfile, but in the process secondfile is deleted.
Removing a File
Use the rm command to remove a file. For example,
rm file3
deletes file3 and its contents. You may remove more than one file at a time by specifying a list of files to be deleted. For example,
rm firstfile secondfile
You will be prompted to confirm whether you really want to remove the files:
rm: remove firstfile (y/n)? y
rm: remove secondfile (y/n)? n
Type y or yes to remove a file; type n or no to leave it intact.
Creating a Directory
Creating directories permits you to organize your files. The command
mkdir project1
creates a directory called project1, where you can store files related to a particular project. The directory that you create will be a subdirectory within your current directory. For details on how to navigate directories and display the files and directories they contain, see List Contents and Navigate Unix Directories.
Moving and Copying Files Into a Directory
The mv and cp commands can be used to put files into a directory. Assume that you want to place some files from your current directory into a newly created directory called project1. The command
mv bibliography project1
will move the file bibliography into the directory project1. The command
cp chapter1 project1
will place a copy of the file chapter1 in the directory project1, but leave chapter1 intact in the current directory. There will now be two copies of chapter1, one in the current directory and one in project1.
Renaming a Directory
You can also use the mv command to rename and move directories. When you type the command
mv project1 project2
the directory called project1 will be given the new name project2 as long as a directory called project2 did not previously exist. If directory project2 already existed before the mv command was issued,
mv project1 project2
would move the directory project1 and its files into the directory project2.
Copying a Directory
You can use the cp command to create a duplicate copy of a directory and its contents. To copy directory project1 to directory proj1copy, for example, you would type
cp -r project1 proj1copy
If directory proj1copy already exists, this command will put a duplicate copy of directory project1 into directory proj1copy.
Removing a Directory
Use the command rmdir to remove an empty directory. Multiple empty directories may be removed by listing them after the command:
rmdir testdir1 testdir2
If you try to remove a directory that is not empty, you will see
rmdir: testdir3: Directory not empty
If you are sure that you want to remove the directory and all the files it contains, use the command
rm -r testdir3
Summary of Commands
Working With Files
mv file1 file2
Renames file1 to file2 (if file2 existed previously, overwrites original contents of file2).
cp file1 file2
Copies file1 as file2 (if file2 existed previously, overwrites original contents of file2).
rm file3 file4
Removes file3 and file4, requesting confirmation for each removal.
Working With Directories
mkdir dir1
Creates a new directory called dir1.
mv dir1 dir2
If dir2 does not exist, renames dir1 to dir2.
If dir2 exists, moves dir1 inside dir2.
cp -r dir1 dir2
If dir2 does not exist, copies dir1 as dir2.
If dir2 does exist, copies dir1 inside dir2.
rmdir dir1
Removes dir1, if dir1 contains no files.
rm -r dir1
Removes dir1 and any files it contains. Use with caution.
Working With Files and Directories
cp file1 dir1
Copies file file1 into existing directory dir1.
mv file2 dir2
Moves file file2 into existing directory dir2.