Big Java, Binder Ready Version: Early Objects
6th Edition
ISBN: 9781119056447
Author: Cay S. Horstmann
Publisher: WILEY
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Chapter 1.7, Problem 24SC
Explanation of Solution
An algorithm for finding the most expensive photo is as follows:
- Pick the first photo and call it “the most expensive so far”.
- For each photo in the sequence
- If it is more expensive than “the most expensive so far”.
- Discard “the most expensive so far”.
- Call this photo “the most expensive so far”.
- If it is more expensive than “the most expensive so far”.
- The photo called “the most expensive so far” is the most expensive photo in the sequence...
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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 1 Solutions
Big Java, Binder Ready Version: Early Objects
Ch. 1.1 - Prob. 1SCCh. 1.1 - Prob. 2SCCh. 1.1 - What does a computer user need to know about...Ch. 1.2 - Prob. 4SCCh. 1.2 - Which part of the computer carries out arithmetic...Ch. 1.2 - A modern smartphone is a computer, comparable to a...Ch. 1.3 - Prob. 7SCCh. 1.3 - Prob. 8SCCh. 1.4 - Prob. 9SCCh. 1.4 - Prob. 10SC
Ch. 1.5 - How do you modify the HelloPrinter program to...Ch. 1.5 - How would you modify the HelloPrinter program to...Ch. 1.5 - Would the program continue to work if you replaced...Ch. 1.5 - What does the following set of statements...Ch. 1.5 - What do the following statements...Ch. 1.6 - Suppose you omit the “” characters around Hello,...Ch. 1.6 - Suppose you change println to Printline in the...Ch. 1.6 - Suppose you change main to hello in the...Ch. 1.6 - When you used your computer, you may have...Ch. 1.6 - Prob. 20SCCh. 1.7 - Prob. 21SCCh. 1.7 - Prob. 22SCCh. 1.7 - Prob. 23SCCh. 1.7 - Prob. 24SCCh. 1.7 - Suppose you have a random sequence of black and...Ch. 1.7 - Prob. 26SCCh. 1 - Prob. 1RECh. 1 - Which parts of a computer can store program code?...Ch. 1 - Which parts of a computer serve to give...Ch. 1 - A toaster is a single-function device, but a...Ch. 1 - Prob. 5RECh. 1 - Prob. 6RECh. 1 - What does this program print?
public class...Ch. 1 - What does this program print? Pay close attention...Ch. 1 - Prob. 9RECh. 1 - Write three versions of the HelloPrinter.java...Ch. 1 - How do you discover syntax errors? How do you...Ch. 1 - Prob. 12RECh. 1 - Prob. 13RECh. 1 - Prob. 14RECh. 1 - Prob. 15RECh. 1 - Prob. 16RECh. 1 - Prob. 17RECh. 1 - Write pseudocode for an algorithm that describes...Ch. 1 - Prob. 19RECh. 1 - Write a program that prints a greeting of your...Ch. 1 - Write a program that prints the sum of the first...Ch. 1 - Write a program that prints the product of the...Ch. 1 - Write a program that prints the balance of an...Ch. 1 - Prob. 5PECh. 1 - Write a program that prints your name in large...Ch. 1 - Write a program that prints your name in Morse...Ch. 1 - Prob. 8PECh. 1 - Prob. 9PECh. 1 - Prob. 10PECh. 1 - Write a program that prints an animal speaking a...Ch. 1 - Prob. 12PECh. 1 - Prob. 13PECh. 1 - Prob. 14PECh. 1 - Prob. 15PECh. 1 - Prob. 16PECh. 1 - Prob. 17PECh. 1 - Prob. 18PECh. 1 - Prob. 19PECh. 1 - Prob. 20PECh. 1 - Prob. 21PECh. 1 - You want to decide whether you should drive your...Ch. 1 - Prob. 2PPCh. 1 - Prob. 3PPCh. 1 - Imagine that you and a number of friends go to a...Ch. 1 - Prob. 5PPCh. 1 - Write an algorithm that allows a robot to mow a...Ch. 1 - Consider a robot that is placed in a room. The...Ch. 1 - Consider a robot that has been placed in a maze....Ch. 1 - Prob. 9PPCh. 1 - Prob. 10PPCh. 1 - Prob. 11PP
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