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Engineering
Computer Science
terminal(macOs)

terminal(macOs)

C++ for Engineers and Scientists
C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter9: Completing The Basics
Section9.2: Exceptions And File Checking
Problem 3E
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this is operating system subject, using (window) cmd or terminal(macOs) to prompt the thing 

Lab Exercise 2: Review of DOS Commands Part 1 a. Enter the following DOS commands, and record or describe what is displayed. -ver -mem [ four kinds of memory should be shown. Project : find out what each type is. ] -vol [ for this one, after entering it once, change drives and enter it again. What has changed? 1 -cls b. Choose a file name (eg: "dirlist.txt") and redirect the "dir" command to it. From the last lab, you will recall that this can be done with the ">" key. So, enter "dir > dirlist.txt", (or whatever file name you have chosen), without the quotes. Look at the file using either "type" or a text editor. Record what it contains. After completing the previous paragraph, enter "dir >> dirlist.txt", substituting whatever file name you used. Now examine the file again. What happened.? Now enter the command "del dirlist.txt", substituting whatever file name you used. Try to view the file again. What happened? The asterisk character "*" is used as a wild card in DOS commands. Try typing the following three commands, and observe what happens with each. 1): "dir *.txt" 2): "dir *.exe" 3): "dir *.com"
Transcribed Image Text:Lab Exercise 2: Review of DOS Commands Part 1 a. Enter the following DOS commands, and record or describe what is displayed. -ver -mem [ four kinds of memory should be shown. Project : find out what each type is. ] -vol [ for this one, after entering it once, change drives and enter it again. What has changed? 1 -cls b. Choose a file name (eg: "dirlist.txt") and redirect the "dir" command to it. From the last lab, you will recall that this can be done with the ">" key. So, enter "dir > dirlist.txt", (or whatever file name you have chosen), without the quotes. Look at the file using either "type" or a text editor. Record what it contains. After completing the previous paragraph, enter "dir >> dirlist.txt", substituting whatever file name you used. Now examine the file again. What happened.? Now enter the command "del dirlist.txt", substituting whatever file name you used. Try to view the file again. What happened? The asterisk character "*" is used as a wild card in DOS commands. Try typing the following three commands, and observe what happens with each. 1): "dir *.txt" 2): "dir *.exe" 3): "dir *.com"
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