C++ for Engineers and Scientists
4th Edition
ISBN: 9781133187844
Author: Bronson, Gary J.
Publisher: Course Technology Ptr
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Chapter 8.4, Problem 2E
Program Plan Intro
- Include library files for various operations.
- Declare required variables.
- Declare object of ifstream.
- Declare function header, fcheck()with object of ifstream as a formal parameter.
- Declare afunctionfcheck()to check that the file exits or not.
- Useif statement to check that the file exist.
- Open the file, by using open() method.
- int main() function is used to perform all the tasks.
- Display the calculated results to the user.
Program Description: The main purpose of the program is to declare a function, fcheck()to check that the given file exits or not and if the file exist, then function should return 1 otherwise it will return 0.
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Students have asked these similar questions
Activity No.
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c. Using the information from part b, prepare a network diagram. Identify the critical path.
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."
Chapter 8 Solutions
C++ for Engineers and Scientists
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