Data Structures and Algorithms in C++
2nd Edition
ISBN: 9780470383278
Author: Michael T. Goodrich
Publisher: Wiley, John & Sons, Incorporated
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Chapter 2, Problem 15R
Program Plan Intro
Count the number of vowels
Program plan:
- Declare header file.
- Declare namespace.
- Define the method “main()”,
- Declare the character variable.
- Declare the counter variable.
- Prompt the user to enter a string.
- Call the method “gets()” to get the string.
- Execute loop till end of loop,
- Check whether the string character contains the vowels,
- Increment the count.
- Check whether the string character contains the vowels,
- Print the number of vowels in a given string.
- Return “0”.
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Given the following Extended-BNF grammar of the basic mathematical expressions:
Show the derivation steps for the expression: ( 2 + 3 ) * 6 – 20 / ( 3 + 1 )
Draw the parsing tree of this expression.
SEE IMAGE
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.
Chapter 2 Solutions
Data Structures and Algorithms in C++
Ch. 2 - Prob. 1RCh. 2 - Prob. 2RCh. 2 - Prob. 3RCh. 2 - Give an example of a software application where...Ch. 2 - Prob. 5RCh. 2 - Draw a class inheritance diagram for the following...Ch. 2 - A derived class’s constructor explicitly invokes...Ch. 2 - Give a short fragment of C++ code that uses the...Ch. 2 - Prob. 9RCh. 2 - Suppose we have a variable p that is declared to...
Ch. 2 - Prob. 11RCh. 2 - Generalize the Person-Student class hierarchy to...Ch. 2 - Prob. 13RCh. 2 - Consider the following code fragment:
class...Ch. 2 - Write a short C++ function that counts the number...Ch. 2 - Write a short C++ function that removes all the...Ch. 2 - Write a short program that takes as input three...Ch. 2 - Prob. 18RCh. 2 - Give an example of a C++ program that outputs its...Ch. 2 - Suppose you are on the design team for a new...Ch. 2 - Most modern C++ compilers have optimizers that can...Ch. 2 - Design a class Line that implements a line, which...Ch. 2 - Write a C++ class that is derived from the...Ch. 2 - Write a C++ class that is derived from the...Ch. 2 - Write a program that consists of three classes, A,...Ch. 2 - Prob. 8CCh. 2 - Write a C++ program that can take a positive...Ch. 2 - Write a C++ program that “makes change.” Your...Ch. 2 - Write a simulator as in the previous project, but...Ch. 2 - Write a C++ program that inputs a document and...
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