MYPROGRAMMINGLAB WITH PEARSON ETEXT
8th Edition
ISBN: 9780134225340
Author: Deitel
Publisher: PEARSON
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Question
Chapter 11, Problem 11.5E
(a)
Program Plan Intro
To choose a suitable word for a blank.
(a)
Expert Solution
Explanation of Solution
Answer: Files
Explanation: A file is a collection of data that is stored in the storage devices.
(b)
Program Plan Intro
To choose a suitable word for a blank.
(b)
Expert Solution
Explanation of Solution
Answer: Record
Explanation: The data can be stored in the form of the fields in the record.
(c)
Program Plan Intro
To choose a suitable word for a blank.
(c)
Expert Solution
Explanation of Solution
Answer: Key
Explanation: To retrieve the data from the record, something unique is required, that is, a key.
(d)
Program Plan Intro
To choose a suitable word for a blank.
(d)
Expert Solution
Explanation of Solution
Answer: String
Explanation: A set of characters is known as a string.
(e)
Program Plan Intro
To choose a suitable word for a blank.
(e)
Expert Solution
Explanation of Solution
Answer: Standard input, standard output, and standard error
Explanation: These are the basic streams required for the file operations.
(f)
Program Plan Intro
To choose a suitable word for a blank.
(f)
Expert Solution
Explanation of Solution
Answer: fputc
Explanation: A fputc() is a pre-defined function to write a character to the file.
(g)
Program Plan Intro
(g)
Expert Solution
Explanation of Solution
Answer: fputs
Explanation: A fputs() is a pre-defined function to write a string to the file.
(h)
Program Plan Intro
To choose a suitable word for a blank.
(h)
Expert Solution
Explanation of Solution
Answer: fwrite
Explanation: Generally, a fwrite() function is used to write to a file.
(i)
Program Plan Intro
To choose a suitable word for a blank.
(i)
Expert Solution
Explanation of Solution
Answer: fseek
Explanation: A fseek() function will move the pointer to the starting of the file.
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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 11 Solutions
MYPROGRAMMINGLAB WITH PEARSON ETEXT
Ch. 11 - Prob. 11.5ECh. 11 - Prob. 11.6ECh. 11 - (Creating Data for a File-Matching Program) Write...Ch. 11 - (File Matching) Exercise 11.3 asked the reader to...Ch. 11 - (Testing the File-Matching Exercises) Run the...Ch. 11 - Prob. 11.10ECh. 11 - (Write Statements to Accomplish a Task) Write...Ch. 11 - (Hardware Inventory) Youre the owner of a hardware...Ch. 11 - (Telephone-Number Word Generator) Standard...Ch. 11 - Prob. 11.14E
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