Introduction to Programming with C++
3rd Edition
ISBN: 9780133252811
Author: Y. Daniel Liang
Publisher: Prentice Hall
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Chapter 1, Problem 12PE
(Average speed in kilometers) Assume a runner runs 24 miles in 1 hour, 40 minutes, and 35 seconds. Write a
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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
Introduction to Programming with C++
Ch. 1 - Prob. 1CPCh. 1 - Prob. 2CPCh. 1 - Prob. 3CPCh. 1 - Prob. 4CPCh. 1 - Prob. 5CPCh. 1 - What is memory used for? What does RAM stand for?...Ch. 1 - Prob. 7CPCh. 1 - Prob. 8CPCh. 1 - Prob. 9CPCh. 1 - What language does the CPU understand?
Ch. 1 - What is an assembly language?
Ch. 1 - What is an assembler?Ch. 1 - What is a high-level programming language?Ch. 1 - What is a source program?
Ch. 1 - What is an interpreter?
Ch. 1 - What is a compiler?
Ch. 1 - Prob. 17CPCh. 1 - Prob. 18CPCh. 1 - Prob. 19CPCh. 1 - Prob. 20CPCh. 1 - Prob. 21CPCh. 1 - Prob. 22CPCh. 1 - Explain the C++ keywords. List some C++ keywords...Ch. 1 - Is C++ case sensitive? What is the case for C++...Ch. 1 - What is the source file name extension, and what...Ch. 1 - What is a comment? What is the syntax for a...Ch. 1 - Prob. 27CPCh. 1 - What does the namespace std stand for?
Ch. 1 - Which of the following preprocessor directive is...Ch. 1 - Prob. 30CPCh. 1 - Show the output of the following code:
Ch. 1 - Show the output of the following code:...Ch. 1 - Prob. 33CPCh. 1 - Prob. 34CPCh. 1 - Identify and fix the errors in the following...Ch. 1 - Prob. 36CPCh. 1 - Reformat the following program according to the...Ch. 1 - Prob. 38CPCh. 1 - Prob. 39CPCh. 1 - If your program needs to read data from a file,...Ch. 1 - Suppose you write a program for computing the...Ch. 1 - Identify and fix the errors in the following...Ch. 1 - (Display three messages) Write a program that...Ch. 1 - (Display five messages) Write a program that...Ch. 1 - (Display a pattern) Write a program that displays...Ch. 1 - (Print a table) Write a program that displays the...Ch. 1 - (Compute expressions) Write a program that...Ch. 1 - (Summation of a series) Write a program that...Ch. 1 - (Approximate ) can be computed using the...Ch. 1 - (Area and perimeter of a circle) Write a program...Ch. 1 - (Area and perimeter of a rectangle) Write a...Ch. 1 - (Average speed in miles) Assume a runner runs 14...Ch. 1 - (Population projection) The U.S. Census Bureau...Ch. 1 - (Average speed in kilometers) Assume a runner runs...
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