Pearson eText for Starting out with Visual C# -- Instant Access (Pearson+)
5th Edition
ISBN: 9780137502783
Author: Tony Gaddis
Publisher: PEARSON+
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Textbook Question
Chapter 2, Problem 8TF
When you double-click a control in the Designer, Visual Studio not only creates an empty event handler, but it also writes some code that you don’t sec, elsewhere in the project that is necessary for the event handler to properly function.
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Students have asked these similar questions
Whentheuserenters!!,themostrecentcommandinthehistoryisexecuted.In the example above, if the user entered the command:
Osh> !!
The ‘ls -l’ command should be executed and echoed on user’s screen. The command should also be placed in the history buffer as the next command.
Whentheuserentersasingle!followedbyanintegerN,theNthcommandin the history is executed. In the example above, if the user entered the command:
Osh> ! 3
The ‘ps’ command should be executed and echoed on the user’s screen. The command should also be placed in the history buffer as the next command.
Error handling:
The program should also manage basic error handling. For example, if there are no commands in the history, entering !! should result in a message “No commands in history.” Also, if there is no command corresponding to the number entered with the single !, the program should output "No such command in history."
Activity No.
Activity
Time (weeks)
Immediate Predecessors
1
Requirements collection
3
2
Requirements structuring
4
1
3
Process analysis
3
2
4
Data analysis
3
2
5
Logical design
50
3,4
6
Physical design
5
5
7
Implementation
6
6
c. Using the information from part b, prepare a network diagram. Identify the critical path.
2. UNIX Shell and History Feature [20 points]
This question consists of designing a C program to serve as a shell interface that
accepts user commands and then executes each command in a separate process. A
shell interface gives the user a prompt, after which the next command is entered.
The example below illustrates the prompt osh> and the user's next command:
cat prog.c. The UNIX/Linux cat command displays the contents of the file
prog.c on the terminal using the UNIX/Linux cat command and your program
needs to do the same.
osh> cat prog.c
The above can be achieved by running your shell interface as a parent process.
Every time a command is entered, you create a child process by using fork(),
which then executes the user's command using one of the system calls in the
exec() family (as described in Chapter 3). A C program that provides the general
operations of a command-line shell can be seen below.
#include
#include
#define MAX LINE 80 /* The maximum length command */
{
int…
Chapter 2 Solutions
Pearson eText for Starting out with Visual C# -- Instant Access (Pearson+)
Ch. 2.1 - Prob. 2.1CPCh. 2.1 - Prob. 2.2CPCh. 2.1 - What is the purpose of an objects sizing handles?Ch. 2.1 - What must each form and control in an applications...Ch. 2.1 - Prob. 2.5CPCh. 2.1 - Prob. 2.6CPCh. 2.1 - Prob. 2.7CPCh. 2.1 - What does a forms Text property determine?Ch. 2.1 - Prob. 2.9CPCh. 2.1 - Prob. 2.10CP
Ch. 2.1 - Prob. 2.11CPCh. 2.1 - Prob. 2.12CPCh. 2.1 - What are the rules for naming controls?Ch. 2.1 - What naming convention do most C# programmers use...Ch. 2.3 - A file that contains program code is known as what...Ch. 2.3 - What must you do if you want your application to...Ch. 2.3 - What does the Program.cs file contain?Ch. 2.3 - Prob. 2.18CPCh. 2.3 - Prob. 2.19CPCh. 2.3 - Prob. 2.20CPCh. 2.3 - Prob. 2.21CPCh. 2.3 - Prob. 2.22CPCh. 2.3 - Prob. 2.23CPCh. 2.3 - Prob. 2.24CPCh. 2.3 - What method do you use in Visual C# to display a...Ch. 2.3 - What is a literal?Ch. 2.3 - Prob. 2.27CPCh. 2.3 - Prob. 2.28CPCh. 2.5 - In which group of the Toolbox can you find the...Ch. 2.5 - Prob. 2.30CPCh. 2.5 - Prob. 2.31CPCh. 2.5 - Prob. 2.32CPCh. 2.5 - Prob. 2.33CPCh. 2.5 - Prob. 2.34CPCh. 2.5 - Prob. 2.35CPCh. 2.5 - How can you use a Label control to display output...Ch. 2.5 - What happens if you assign an empty string to a...Ch. 2.7 - What is a PictureBox control used for?Ch. 2.7 - Prob. 2.39CPCh. 2.7 - Prob. 2.40CPCh. 2.7 - Prob. 2.41CPCh. 2.7 - Prob. 2.42CPCh. 2.7 - Prob. 2.43CPCh. 2.7 - Prob. 2.44CPCh. 2.8 - Prob. 2.45CPCh. 2.8 - Prob. 2.46CPCh. 2.8 - Prob. 2.47CPCh. 2.8 - Why do programmers insert blank lines and...Ch. 2.10 - What statement do you use to close an applications...Ch. 2.10 - Prob. 2.50CPCh. 2.10 - Prob. 2.51CPCh. 2.10 - Prob. 2.52CPCh. 2 - Prob. 1MCCh. 2 - Prob. 2MCCh. 2 - __________ is the name of the blank form that...Ch. 2 - Prob. 4MCCh. 2 - A file that contains program code is called a(n)...Ch. 2 - A namespace is container that holds __________. a....Ch. 2 - A(n) __________ is a method that executes when a...Ch. 2 - Prob. 8MCCh. 2 - Prob. 9MCCh. 2 - Prob. 10MCCh. 2 - Prob. 11MCCh. 2 - The time during which you build the GUI and write...Ch. 2 - The time during which an application is executing...Ch. 2 - When you want to display text on a form, you use a...Ch. 2 - The __________ property allows you to set the...Ch. 2 - A __________ property can be set to one of two...Ch. 2 - Prob. 17MCCh. 2 - Prob. 18MCCh. 2 - In code, you use a(n) __________ to store a value...Ch. 2 - Prob. 20MCCh. 2 - The standard notation for referring to a controls...Ch. 2 - __________ is a feature of Visual Studio that...Ch. 2 - Prob. 23MCCh. 2 - Prob. 24MCCh. 2 - Prob. 25MCCh. 2 - Prob. 26MCCh. 2 - Most controls have a __________ property that...Ch. 2 - A(an) __________ appears on one line in a program....Ch. 2 - A __________ can occupy multiple consecutive lines...Ch. 2 - Programmers commonly use blank lines and...Ch. 2 - To close an applications form in code, you use the...Ch. 2 - Changing an objects Text property also changes the...Ch. 2 - When a form is created, its Text property is...Ch. 2 - The forms title is displayed in the bar along the...Ch. 2 - Prob. 4TFCh. 2 - Prob. 5TFCh. 2 - Prob. 6TFCh. 2 - In C# code, each opening brace must have a...Ch. 2 - When you double-click a control in the Designer,...Ch. 2 - Prob. 9TFCh. 2 - Prob. 10TFCh. 2 - Prob. 11TFCh. 2 - Prob. 12TFCh. 2 - Prob. 13TFCh. 2 - Prob. 14TFCh. 2 - Prob. 15TFCh. 2 - Prob. 16TFCh. 2 - When you write the values true or false in code,...Ch. 2 - Prob. 18TFCh. 2 - To close an applications form in code, you use the...Ch. 2 - The Visual Studio code editor examines each...Ch. 2 - What does a bounding box indicate about an object...Ch. 2 - Prob. 2SACh. 2 - What determines an objects appearance and other...Ch. 2 - Prob. 4SACh. 2 - Prob. 5SACh. 2 - What steps must you perform to change a forms Size...Ch. 2 - Prob. 7SACh. 2 - Prob. 8SACh. 2 - Prob. 9SACh. 2 - Prob. 10SACh. 2 - Prob. 11SACh. 2 - Prob. 12SACh. 2 - Prob. 13SACh. 2 - Prob. 14SACh. 2 - Prob. 15SACh. 2 - Prob. 16SACh. 2 - Prob. 17SACh. 2 - Prob. 18SACh. 2 - What are the three types of comments you can use...Ch. 2 - How does Visual Studio help you to quickly correct...Ch. 2 - Prob. 1AWCh. 2 - Prob. 2AWCh. 2 - Prob. 3AWCh. 2 - Suppose an applications GUI has a Label control...Ch. 2 - Suppose an applications GUI has a PictureBox...Ch. 2 - Latin Translator Look at the following list of...Ch. 2 - Prob. 2PPCh. 2 - Prob. 3PPCh. 2 - Joke and Punch Line A joke typically has two...Ch. 2 - Prob. 5PPCh. 2 - Prob. 6PP
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