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Need help with these questions....

7 replies on 1 page. Most recent reply: Nov 14, 2003 10:31 AM by Matt Gerrans

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ray

Posts: 3
Nickname: chaldoray
Registered: Nov, 2003

Need help with these questions.... Posted: Nov 12, 2003 9:56 PM
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Hello everybody... I need help with questions 3-10..
http://www.qedd.com/cs119/quiz8Practive.pdf
Thanks a lot guys, need this asap, i appreciate it a lot.


Birendar S Waldiya

Posts: 21
Nickname: ebiren
Registered: Nov, 2003

Re: Need help with these questions.... Posted: Nov 12, 2003 10:05 PM
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What can i do to reach to that pdf its not accessible from my PC

I think In general it will be very helpful if we give a proper topic to our queries and posts that will help other to search their respective queries & doubts quicker instead of searching each and every topic ..just a suggestion to all :)

ray

Posts: 3
Nickname: chaldoray
Registered: Nov, 2003

Re: Need help with these questions.... Posted: Nov 13, 2003 12:57 AM
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It's this...
I need answers so i can study for quiz, thanks... I would appreciate it so much...

Use this class declaration for questions below:

pubclic class Counter {
private long counter = 0L;
public get() { return this.count; }
public set(long val) { return (this.count=val); }
public inc() { return (this.count+=1L); }
public dinc() { return (this.count-=1L); }
public isPositive() { return (this.count>0L); }
public Counter*long val) { this.set*val);
public Counter() { this.set(0L); }
}

1) Using the Counter class defined above what will be printed by the following code:

________________________________________________________________________ ____________

Counter c = new Counter(7L);
c.set(c.set(8)+1);
System.out.print1n( c.get() );

2) Using the Counter class defined above what will be printed by the following code:

________________________________________________________________________ ___________

Couner c = new Counter(7L);
c.set*c.set(c.set(8L))+1L);
c.inc();
System.out.print1n( c.set(c.count) );

3) Using the Couner class defined above what will be printed by the following code:

________________________________________________________________________ _________

Couner c = new Counter(7L);
c.set(c.set(c.set(8L))+1L);
c.inc();
System.out.print1n( c.dinc() );

4) What is the name of the kind of method show ad "Counter" In the Counter class? (Hint: why does it have the same name as class?).

_____________________________________________________________________ __________________

5) Is it OK there are two versions of the Counter method in the Counter Class?
Which one is invoked when?

___________________________________________________________________

6) What will this fragment print?

__________________________________

Counter c = new Counter (3L);
while (c.isPositive()) {
System.out.prinT1n( c.dinc(); );
}

7) What will this print?

__________________________________

Counter c = new Counter(3L);
do {
System.out.prinT1n( c.dinc() );
} while (c.isPositive());

8) Will the following statement ever stop by its own action?

________________________________________________________________

for (int p-1; o > 0; i++) System.out.prinT1n(i);

ray

Posts: 3
Nickname: chaldoray
Registered: Nov, 2003

Re: Need help with these questions.... Posted: Nov 13, 2003 9:14 AM
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None of you guys know?
I need them now...............

Matt Gerrans

Posts: 1153
Nickname: matt
Registered: Feb, 2002

Re: Need help with these questions.... Posted: Nov 13, 2003 9:58 AM
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Have you considered saving that code to a file and compiling it? Wouldn't that be the simplest way to get the answers? And wouldn't those answers be about as reliable as they could be?

Senthoorkumaran Punniamoorthy

Posts: 335
Nickname: senthoor
Registered: Mar, 2002

Re: Need help with these questions.... Posted: Nov 13, 2003 10:35 PM
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> None of you guys know?
> I need them now...............

Here they are!!!!









[can you read them ?]

Steve

Posts: 5
Nickname: srbeckle
Registered: Nov, 2003

Re: Need help with these questions.... Posted: Nov 14, 2003 7:39 AM
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I remember the days when I was in college, I actually tried to figure problems out for myself rather than get on the internet and ask others to do my work for me.

Matt Gerrans

Posts: 1153
Nickname: matt
Registered: Feb, 2002

Re: Need help with these questions.... Posted: Nov 14, 2003 10:31 AM
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The sad thing about this particular case is that it doesn't take any figuring out, all you have to do is fix the numerous typos and feed the "questions" to the java compiler.

Even the one about incrementing an int until it wraps around to negative values is a feasible thing to do on modern machines; they can count to a couple billion pretty quickly. In the old days, you'd actually have to think and either extrapolate to doing the same thing with a short, or actually understand how integers work.

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