Online quiz Project help

I have got an Project for my Class XII
ONLINE QUIZ

i need to ask the user to select the subject and then i must ask the questions relating the subject

After 30 SEC if the user doesn't answer i need to CHANGE THE QUESTION,but i don't have any idea of how to change it within 30 sec

then i need to option for the examiner to change and modify( or delete) question
and i am thinking of using a structure containing the following
1.Play(by the user)
2.Modify question(for examiner)
3.Add questions(for examiner)
4.Exit

Now judging from your name, and your IP address (which we moderators can see), I'm guessing you want an answer that is compatible with the TurboC fossil your educational institutions just love to push on the unsuspecting masses.

Quote:

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Originally Posted by Giridhar Sanjay

After 30 SEC if the user doesn't answer i need to CHANGE THE QUESTION,but i don't have any idea of how to change it within 30 sec

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That's going to be the hard part, and the solution is probably platform/library specific, IF you mean this is an active timer.

BUT if you mean you can just time how long it takes for the user to answer, and if it takes more than 30 seconds, you say "Too late, new question", then that is easy. Use time() and subtract then from now to give you the elapsed time.

Quote:

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Originally Posted by Salem

Now judging from your name, and your IP address (which we moderators can see), I'm guessing you want an answer that is compatible with the TurboC fossil your educational institutions just love to push on the unsuspecting masses.

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Yea,i know moderators can view IP address as i am a Mod to a similar site like this one!! but unpopular
Chemistry Help Forum

Quote:

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Originally Posted by MK27

That's going to be the hard part, and the solution is probably platform/library specific, IF you mean this is an active timer.

BUT if you mean you can just time how long it takes for the user to answer, and if it takes more than 30 seconds, you say "Too late, new question", then that is easy. Use time() and subtract then from now to give you the elapsed time.

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Back to my question,
subtract then from now? what does it actually mean & time() represents a function or what?
Sorry for the inconvenience,i am new and weak in C++ (doesn't mean i am strong in C)

Yes, time() is a standard function from <ctime>, or <time.h>. It returns seconds since the epoch:

Code:

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time_t then = time(NULL);
[....]
time_t now = time(NULL);
if (now - then >= 30) ...

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1.Play(by the user)
2.Modify question(for examiner)
3.Add questions(for examiner)
4.Exit

For the above should i use a class for it?
And is there an alternate way of doing it instead of using time.h? and i think i need to use timer instead of this i think though
__________________________________________________ ________________________________

Why is that i can't access all privileges like viewing my profile

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For the above should i use a class for it?
And is there an alternate way of doing it instead of using time.h? and i think i need to use timer instead of this i think though

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You could put a Question and its answer in a class...containing all the functions(modify,show..etc)..
AFAIK :The Alternatives are not portable...eg: gettimeofday ..(which btw..can give an accuracy up to nanoseconds!! )

Quote:

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Originally Posted by Giridhar Sanjay

i think i need to use timer instead of this i think though

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I doubt it, because that will involve multi-threading, by you or a library, and considering this is more or less your first C++ program, no one is going to expect that and you'd be crazy to try. ;)

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Why is that i can't access all privileges like viewing my profile

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You need a minimum number of posts, I think 6 or so.

You could use classes if you have covered them in your course, otherwise don't worry, this is a basic I/O exercise.

Quote:

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Originally Posted by manasij7479

You could put a Question and its answer in a class...containing all the functions(modify,show..etc)..
AFAIK :The Alternatives are not portable...eg: gettimeofday ..(which btw..can give an accuracy up to nanoseconds!! )

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But what shall i do for adding questions??
I think structures may also be useful

Use std::vector if you're permitted...(If it seems new to you, remember it is not at all difficult to understand)
If your class or structure is QA:

Code:

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std::vector<QA> mylist; //declaring it
mylist.push_back(your_new_QA_object); //adds another

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std::vector is not allowed for us,
thanks guys i got an idea of how to do now
i will try to do on from here

Quote:

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Originally Posted by MK27

Yes, time() is a standard function from <ctime>, or <time.h>. It returns seconds since the epoch:

Code:

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time_t then = time(NULL);
[....]
time_t now = time(NULL);
if (now - then >= 30) ...

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You shouldn't be using "-" there, as time_t might not be an integer type and might not have an minus operator. You should really use difftime(now, then), at least if it needs to be portable.