Accelerated C++ --Exercise 8-5

Question

4.00/5 (1 vote)

See more:

Accelerated C++ --Exercise 8-5:

Re-implement the gen_sentence and xref functions from Chapter 7 to use output iterators rather than putting their output in one data structure. Test these new versions by writing programs that attach the output iterator directly to the standard output, and by storing the results in a list and a map, respectively.

not looking for the solutions, but struggling with the wording of this exercise, extending/correcting my to-do-list would be helpful..the use of the word respectively is the confusing part

to-do-list:

Modify gen_sentence() to use a output iterator instead of returning a data struct.
Modify xref() to use a output iterator instead of returning a data struct.
Test driver that attaches gen_sentence()-->Out to std::cout.
Test driver that attaches xref()-->Out to std::cout.
....
....
....
....
....

Posted 10-Apr-11 0:15am

tukbriz

Add a Solution

1 solution

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Espen Harlinn · Answer 1 · 2011-04-10T00:23:00

Solution 1

>>the use of the word respectively is the confusing part
Create several solutions/programs leveraging your output iterator:
1. program uses output iterator to write directly to the standard output
2. program uses output iterator to store the results in a list
3. program uses output iterator to store the results in a map

Hope this clarifies what is meant by respectively

Regards
Espen Harlinn

Posted 10-Apr-11 0:23am

Espen Harlinn

Comments

tukbriz 10-Apr-11 7:18am

thanks for reply Espen, but can you be more specific, results from which function? ..or is it both?

have a look at the usage examples here first:
dictionary.reference.com/browse/respectively

Espen Harlinn 10-Apr-11 7:33am

Pretty hard to answer without looking at the book :) - but this is what you usually are expected to do when working on exercises. Things are often kept simple and to the point. When you have created three separete programs, using a similar structure, combining them into a single solution/program should be quite simple ...

tukbriz 10-Apr-11 7:32am

edit: link to page in book bbqsrc.net/acceleratedc++/48.htm ..go with the question wording in my post as the errata has been updated since..but the link provides context good enough

is this what you mean?:

Modify gen_sentence() to use a output iterator instead of returning a data struct.
Test driver: gen_sentence()-->Out-->std::cout.
Test driver: gen_sentence()-->Out-->List.
Test driver: gen_sentence()-->Out-->Map.

Modify xref() to use a output iterator instead of returning a data struct.
Test driver: xref()-->Out-->std::cout.
Test driver: xref()-->Out-->List.
Test driver: xref()-->Out-->Map.

Espen Harlinn 10-Apr-11 7:47am

Assuming gen_sentence() returns an output_iterator_t:

std::out << gen_sentence();
myMapType map;
map << gen_sentence();
myListType list;
list << gen_sentence();

ostream &operator<<( std::ostream &out, output_iterator_t &it ) {
// do you stuff - i.e.
output_iterator_t::value_type& v = *it;
out << v;
return out;
}

myMapType& operator<<( myMapType& map, output_iterator& it ) {
// do you stuff
return map;
}

or something similar :) as I don't have the book, I'm kind of guessing at what you want/need.

Sandeep Mewara 10-Apr-11 11:57am

My 5!

Espen Harlinn 10-Apr-11 12:03pm

Thanks Sandeep!