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A C program

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  A C program Nikhil Joshi <nitin.nitinperderusted.rastogi@gmail.com> - 2012-10-23 08:54 -0700
    Re: A C program James Kuyper <jameskuyper@verizon.net> - 2012-10-23 12:05 -0400
      Re: A C program Rich Webb <bbew.ar@mapson.nozirev.ten> - 2012-10-23 13:07 -0400
      Re: A C program BruceS <bruces42@hotmail.com> - 2012-10-29 21:58 +0000
    Re: A C program Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2012-10-23 10:46 -0600
    Re: A C program Keith Thompson <kst-u@mib.org> - 2012-10-23 13:28 -0700
    Re: A C program tom st denis <tom@iahu.ca> - 2012-10-30 06:28 -0700
      Re: A C program Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-10-30 15:42 +0000
        Re: A C program tom st denis <tom@iahu.ca> - 2012-10-30 08:44 -0700
          Re: A C program Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-10-30 17:28 +0000
            Re: A C program tom st denis <tom@iahu.ca> - 2012-10-30 10:32 -0700
              Re: A C program Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-10-30 18:21 +0000
                Re: A C program "Bill Cunningham" <nospam@nspam.invalid> - 2012-11-04 16:57 -0500
      Re: A C program "BartC" <bc@freeuk.com> - 2012-10-30 16:12 +0000
        Re: A C program tom st denis <tom@iahu.ca> - 2012-10-30 09:38 -0700
          Re: A C program James Kuyper <jameskuyper@verizon.net> - 2012-10-30 12:57 -0400
            Re: A C program tom st denis <tom@iahu.ca> - 2012-10-30 10:26 -0700
              Re: A C program James Kuyper <jameskuyper@verizon.net> - 2012-10-30 14:30 -0400
                Re: A C program tom st denis <tom@iahu.ca> - 2012-10-30 14:47 -0700
                  Re: A C program James Kuyper <jameskuyper@verizon.net> - 2012-10-30 18:29 -0400
                Re: A C program "Bill Cunningham" <nospam@nspam.invalid> - 2012-11-04 16:35 -0500
                  Re: A C program Keith Thompson <kst-u@mib.org> - 2012-11-04 14:25 -0800
                    Re: A C program "BartC" <bc@freeuk.com> - 2012-11-04 23:53 +0000
                      Re: A C program Keith Thompson <kst-u@mib.org> - 2012-11-04 16:09 -0800
              Re: A C program Rui Maciel <rui.maciel@gmail.com> - 2012-11-01 18:17 +0000
        Re: A C program Eric Sosman <esosman@comcast-dot-net.invalid> - 2012-10-30 13:02 -0400
      Re: A C program Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2012-10-30 11:15 -0600
        Re: A C program tom st denis <tom@iahu.ca> - 2012-10-30 10:28 -0700
          Re: A C program Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-10-30 17:42 +0000
            Re: A C program tom st denis <tom@iahu.ca> - 2012-10-30 10:49 -0700
              Re: A C program Greg Martin <greg@softsprocket.com> - 2012-10-30 11:11 -0700
              Re: A C program Rui Maciel <rui.maciel@gmail.com> - 2012-11-01 18:11 +0000
          Re: A C program "Bill Cunningham" <nospam@nspam.invalid> - 2012-11-04 16:38 -0500
        Re: A C program Malcolm McLean <malcolm.mclean5@btinternet.com> - 2012-11-05 07:45 -0800
          Re: A C program James Kuyper <jameskuyper@verizon.net> - 2012-11-05 13:28 -0500
      Re: A C program Rui Maciel <rui.maciel@gmail.com> - 2012-11-01 18:03 +0000
      Re: A C program Rui Maciel <rui.maciel@gmail.com> - 2012-11-01 18:13 +0000

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#27583 — A C program

write a program to calculate decimal number from binary number?

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#27586

On 10/23/2012 11:54 AM, Nikhil Joshi wrote:
> write a program to calculate decimal number from binary number?

Done. Next?

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#27592

On Tue, 23 Oct 2012 12:05:44 -0400, James Kuyper
<jameskuyper@verizon.net> wrote:

>On 10/23/2012 11:54 AM, Nikhil Joshi wrote:
>> write a program to calculate decimal number from binary number?
>
>Done. Next?

Whee!   +1

-- 
Rich Webb     Norfolk, VA

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#27806

On Tue, 23 Oct 2012 12:05:44 -0400, James Kuyper wrote:

> On 10/23/2012 11:54 AM, Nikhil Joshi wrote:
>> write a program to calculate decimal number from binary number?
> 
> Done. Next?

Your posts are among the first I look for.  Often this provides 
information, but this time it gave me a good laugh.  Thanks.

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#27591

Nikhil Joshi <nitin.nitinperderusted.rastogi@gmail.com> writes:

> write a program to calculate decimal number from binary number?

We can better help if you'll show us what you've already come up with in
your attempts to write it.

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#27604

Nikhil Joshi <nitin.nitinperderusted.rastogi@gmail.com> writes:
> write a program to calculate decimal number from binary number?

We're happy to answer questions about the C language here.  Show us
a program, and we can probably help you figure out what's wrong
with it.  We won't do your homework for you.

But if you really want us to, please give us your instructor's e-mail
address, so we can submit our solutions directly.  If we do the work,
we should get the credit, don't you think?

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
    Will write code for food.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

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#27810

On Oct 23, 11:54 am, Nikhil Joshi
<nitin.nitinperderusted.rast...@gmail.com> wrote:
> write a program to calculate decimal number from binary number?

I'mma gonna go beyond what the other people wrote and just say this.

Drop out of whatever program you are in now.  If this sort of program
stumps you you have no business studying computer science nor software
development.  This is the equivalent of a math major asking us to help
them solve the matrix

[ 2 1 ]
[ 1 1 ]

It's the sort of thing that if you have to ask you really shouldn't be
in the business.

So please, do yourself and anyone you'd potentially end up working
with a favour and either STUDY FUCKING HARDER or DROP THE FUCK OUT.

Sincerely,
Tom

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#27818

tom st denis <tom@iahu.ca> writes:

> On Oct 23, 11:54 am, Nikhil Joshi
> <nitin.nitinperderusted.rast...@gmail.com> wrote:
>> write a program to calculate decimal number from binary number?
>
> I'mma gonna go beyond what the other people wrote and just say this.
>
> Drop out of whatever program you are in now.  If this sort of program
> stumps you you have no business studying computer science nor software
> development.  This is the equivalent of a math major asking us to help
> them solve the matrix

I may have missed some of this thread, but how do you know the OP is a
CS major?  I was quite good at academic CS, but there was a time when I
did not know how to do this.

<snip>
-- 
Ben.

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#27820

On Oct 30, 11:42 am, Ben Bacarisse <ben.use...@bsb.me.uk> wrote:
> tom st denis <t...@iahu.ca> writes:
>
> > On Oct 23, 11:54 am, Nikhil Joshi
> > <nitin.nitinperderusted.rast...@gmail.com> wrote:
> >> write a program to calculate decimal number from binary number?
>
> > I'mma gonna go beyond what the other people wrote and just say this.
>
> > Drop out of whatever program you are in now.  If this sort of program
> > stumps you you have no business studying computer science nor software
> > development.  This is the equivalent of a math major asking us to help
> > them solve the matrix
>
> I may have missed some of this thread, but how do you know the OP is a
> CS major?  I was quite good at academic CS, but there was a time when I
> did not know how to do this.

This is clearly a homework question of some sort given the lack of
details other than a fairly obvious problem statement that came from a
lab somewhere.

Tom

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#27828

tom st denis <tom@iahu.ca> writes:

> On Oct 30, 11:42 am, Ben Bacarisse <ben.use...@bsb.me.uk> wrote:
>> tom st denis <t...@iahu.ca> writes:
>>
>> > On Oct 23, 11:54 am, Nikhil Joshi
>> > <nitin.nitinperderusted.rast...@gmail.com> wrote:
>> >> write a program to calculate decimal number from binary number?
>>
>> > I'mma gonna go beyond what the other people wrote and just say this.
>>
>> > Drop out of whatever program you are in now.  If this sort of program
>> > stumps you you have no business studying computer science nor software
>> > development.  This is the equivalent of a math major asking us to help
>> > them solve the matrix
>>
>> I may have missed some of this thread, but how do you know the OP is a
>> CS major?  I was quite good at academic CS, but there was a time when I
>> did not know how to do this.
>
> This is clearly a homework question of some sort given the lack of
> details other than a fairly obvious problem statement that came from a
> lab somewhere.

Yes it is.  I don't see how that relates to my message.

-- 
Ben.

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#27830

On Oct 30, 1:28 pm, Ben Bacarisse <ben.use...@bsb.me.uk> wrote:
> tom st denis <t...@iahu.ca> writes:
>
>
>
>
>
>
>
>
>
> > On Oct 30, 11:42 am, Ben Bacarisse <ben.use...@bsb.me.uk> wrote:
> >> tom st denis <t...@iahu.ca> writes:
>
> >> > On Oct 23, 11:54 am, Nikhil Joshi
> >> > <nitin.nitinperderusted.rast...@gmail.com> wrote:
> >> >> write a program to calculate decimal number from binary number?
>
> >> > I'mma gonna go beyond what the other people wrote and just say this.
>
> >> > Drop out of whatever program you are in now.  If this sort of program
> >> > stumps you you have no business studying computer science nor software
> >> > development.  This is the equivalent of a math major asking us to help
> >> > them solve the matrix
>
> >> I may have missed some of this thread, but how do you know the OP is a
> >> CS major?  I was quite good at academic CS, but there was a time when I
> >> did not know how to do this.
>
> > This is clearly a homework question of some sort given the lack of
> > details other than a fairly obvious problem statement that came from a
> > lab somewhere.
>
> Yes it is.  I don't see how that relates to my message.

Even if the problem were challenging [which I maintain it is not] the
very lack of effort on their part should be a sufficient strike
against their character.

Tom

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#27839

tom st denis <tom@iahu.ca> writes:

> On Oct 30, 1:28 pm, Ben Bacarisse <ben.use...@bsb.me.uk> wrote:
>> tom st denis <t...@iahu.ca> writes:
>> > On Oct 30, 11:42 am, Ben Bacarisse <ben.use...@bsb.me.uk> wrote:
>> >> tom st denis <t...@iahu.ca> writes:
>>
>> >> > On Oct 23, 11:54 am, Nikhil Joshi
>> >> > <nitin.nitinperderusted.rast...@gmail.com> wrote:
>> >> >> write a program to calculate decimal number from binary number?
>>
>> >> > I'mma gonna go beyond what the other people wrote and just say this.
>>
>> >> > Drop out of whatever program you are in now.  If this sort of program
>> >> > stumps you you have no business studying computer science nor software
>> >> > development.  This is the equivalent of a math major asking us to help
>> >> > them solve the matrix
>>
>> >> I may have missed some of this thread, but how do you know the OP is a
>> >> CS major?  I was quite good at academic CS, but there was a time when I
>> >> did not know how to do this.
>>
>> > This is clearly a homework question of some sort given the lack of
>> > details other than a fairly obvious problem statement that came from a
>> > lab somewhere.
>>
>> Yes it is.  I don't see how that relates to my message.
>
> Even if the problem were challenging [which I maintain it is not] the
> very lack of effort on their part should be a sufficient strike
> against their character.

Not relevant to my point.  You did read my message?  I was just asking
how you know they are studying at a level where asking this means they
should drop out now.  They may be 8 and only just less talented than
your were at 8.  They may be 53 and studying programing after decades
of being a simultaneous translator at the UN.  They may know a method
but be at a loss how to start doing it in C.  There are countless
mitigating circumstances that would mean that it's inappropriate to
swear at them and tell them to drop out now.

Anyway, I was only asking what else you maybe knew that might justify
your extreme position.

-- 
Ben.

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#28020

Ben Bacarisse wrote:
> Not relevant to my point.  You did read my message?  I was just asking
> how you know they are studying at a level where asking this means they
> should drop out now.  They may be 8 and only just less talented than
> your were at 8.  They may be 53 and studying programing after decades
> of being a simultaneous translator at the UN.  They may know a method
> but be at a loss how to start doing it in C.  There are countless
> mitigating circumstances that would mean that it's inappropriate to
> swear at them and tell them to drop out now.
>
> Anyway, I was only asking what else you maybe knew that might justify
> your extreme position.

    Don't feed the trolls

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#27822

"tom st denis" <tom@iahu.ca> wrote in message 
news:8b079e76-7530-46bd-ad32-e03deb4310fe@h15g2000yqe.googlegroups.com...

> This is the equivalent of a math major asking us to help
> them solve the matrix
>
> [ 2 1 ]
> [ 1 1 ]

What's the answer?

-- 
Bartc 

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#27823

On Oct 30, 12:13 pm, "BartC" <b...@freeuk.com> wrote:
> "tom st denis" <t...@iahu.ca> wrote in messagenews:8b079e76-7530-46bd-ad32-e03deb4310fe@h15g2000yqe.googlegroups.com...
>
> > This is the equivalent of a math major asking us to help
> > them solve the matrix
>
> > [ 2 1 ]
> > [ 1 1 ]
>
> What's the answer?

R1-R2 and then R2-R1.

So suppose you had the linear system

[2 1][3]
[1 1][2]

Then you'd have

[1 0][1]
[1 1][2]

And

[1 0][1]
[0 1][1]

So x = 1 and y = 1 in this linear system.

MAGIC!

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#27824

On 10/30/2012 12:38 PM, tom st denis wrote:
> On Oct 30, 12:13�pm, "BartC" <b...@freeuk.com> wrote:
>> "tom st denis" <t...@iahu.ca> wrote in messagenews:8b079e76-7530-46bd-ad32-e03deb4310fe@h15g2000yqe.googlegroups.com...
>>
>>> This is the equivalent of a math major asking us to help
>>> them solve the matrix
>>
>>> [ 2 1 ]
>>> [ 1 1 ]
>>
>> What's the answer?
> 
> R1-R2 and then R2-R1.

You haven't defined what R1 and R2 refer to, nor what those expressions
mean.

> So suppose you had the linear system
> 
> [2 1][3]
> [1 1][2]
> 
> Then you'd have
> 
> [1 0][1]
> [1 1][2]
> 
> And
> 
> [1 0][1]
> [0 1][1]
> 
> So x = 1 and y = 1 in this linear system.

Nor have you defined what x and y refer to.

Your original statement of the problem lacked sufficient detail to make
"solve" an applicable verb. There was sufficient information to use
"invert", instead. If you had added some variables, and asked to solve
for the values of those variables, for example:

"Solve
| 2 1 | |x| = |a|
| 1 1 | |y|   |b|

For x and y in terms of a and b"

that would also have been a meaningful question, with the answer x=a-b,
y=2b-a.
-- 
James Kuyper

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#27827

On Oct 30, 12:57 pm, James Kuyper <jameskuy...@verizon.net> wrote:
> On 10/30/2012 12:38 PM, tom st denis wrote:
>
> > On Oct 30, 12:13 pm, "BartC" <b...@freeuk.com> wrote:
> >> "tom st denis" <t...@iahu.ca> wrote in messagenews:8b079e76-7530-46bd-ad32-e03deb4310fe@h15g2000yqe.googlegroups.com...
>
> >>> This is the equivalent of a math major asking us to help
> >>> them solve the matrix
>
> >>> [ 2 1 ]
> >>> [ 1 1 ]
>
> >> What's the answer?
>
> > R1-R2 and then R2-R1.
>
> You haven't defined what R1 and R2 refer to, nor what those expressions
> mean.

Row 1 and Row 2 ... are you really this dense?

> > So x = 1 and y = 1 in this linear system.
>
> Nor have you defined what x and y refer to.

[2x 1y][3]
[1x 1y][2]

Whatever, you're missing the point.  Usually if I say "produce a
solution for this matrix" it means the program [or steps] required to
reduce it to REF.  Then when you plug in variables in your column
matrix you need only run the program and voila your solution.

For instance, this is used in Karatsuba and Toom-Cook multiplication.
You end up with a constant matrix but variable column matrix to attach
to it.  So the way you solve the system NEVER changes and you can
optimize it thusly.

Tom

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#27840

On 10/30/2012 01:26 PM, tom st denis wrote:
> On Oct 30, 12:57�pm, James Kuyper <jameskuy...@verizon.net> wrote:
>> On 10/30/2012 12:38 PM, tom st denis wrote:
>>
>>> On Oct 30, 12:13 pm, "BartC" <b...@freeuk.com> wrote:
>>>> "tom st denis" <t...@iahu.ca> wrote in messagenews:8b079e76-7530-46bd-ad32-e03deb4310fe@h15g2000yqe.googlegroups.com...
>>
>>>>> This is the equivalent of a math major asking us to help
>>>>> them solve the matrix
>>
>>>>> [ 2 1 ]
>>>>> [ 1 1 ]
>>
>>>> What's the answer?
>>
>>> R1-R2 and then R2-R1.
>>
>> You haven't defined what R1 and R2 refer to, nor what those expressions
>> mean.
> 
> Row 1 and Row 2 ... are you really this dense?
> 
>>> So x = 1 and y = 1 in this linear system.
>>
>> Nor have you defined what x and y refer to.
> 
> [2x 1y][3]
> [1x 1y][2]
> 
> Whatever, you're missing the point.

No - I understand precisely the point you were trying to make. I'm
pointing out that you expressed it badly.

> ...  Usually if I say "produce a
> solution for this matrix" it means the program [or steps] required to
> reduce it to REF.

Well, no, it doesn't - that's my point. It doesn't actually mean
anything. A matrix doesn't have a solution.

An equation containing a matrix might (or might not) have a solution. If
you have A*x=b, and A is a scalar, such as 5, you can say "solve for x
in terms of b, and that's meaningful (unless A==0). You can also say
"solve A", but that's not meaningful. If A is a matrix, like the one you
gave above, and x and b are column vectors, you can also solve for x in
terms of b (unless det(A)==0), but it's meaningless to ask someone to
say "solve A", for exactly the same reason that it's meaningless to ask
them to "solve A" when A == 5.
You can ask them to invert A; if A is 5, that's just 1/5. If A is a
matrix, that's more complicated; but that's not the same as asking them
to "solve A".
-- 
James Kuyper

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#27849

On Oct 30, 2:30 pm, James Kuyper <jameskuy...@verizon.net> wrote:
> On 10/30/2012 01:26 PM, tom st denis wrote:
>
>
>
>
>
>
>
>
>
> > On Oct 30, 12:57 pm, James Kuyper <jameskuy...@verizon.net> wrote:
> >> On 10/30/2012 12:38 PM, tom st denis wrote:
>
> >>> On Oct 30, 12:13 pm, "BartC" <b...@freeuk.com> wrote:
> >>>> "tom st denis" <t...@iahu.ca> wrote in messagenews:8b079e76-7530-46bd-ad32-e03deb4310fe@h15g2000yqe.googlegroups.com...
>
> >>>>> This is the equivalent of a math major asking us to help
> >>>>> them solve the matrix
>
> >>>>> [ 2 1 ]
> >>>>> [ 1 1 ]
>
> >>>> What's the answer?
>
> >>> R1-R2 and then R2-R1.
>
> >> You haven't defined what R1 and R2 refer to, nor what those expressions
> >> mean.
>
> > Row 1 and Row 2 ... are you really this dense?
>
> >>> So x = 1 and y = 1 in this linear system.
>
> >> Nor have you defined what x and y refer to.
>
> > [2x 1y][3]
> > [1x 1y][2]
>
> > Whatever, you're missing the point.
>
> No - I understand precisely the point you were trying to make. I'm
> pointing out that you expressed it badly.
>
> > ...  Usually if I say "produce a
> > solution for this matrix" it means the program [or steps] required to
> > reduce it to REF.
>
> Well, no, it doesn't - that's my point. It doesn't actually mean
> anything. A matrix doesn't have a solution.
>
> An equation containing a matrix might (or might not) have a solution. If
> you have A*x=b, and A is a scalar, such as 5, you can say "solve for x
> in terms of b, and that's meaningful (unless A==0). You can also say
> "solve A", but that's not meaningful. If A is a matrix, like the one you
> gave above, and x and b are column vectors, you can also solve for x in
> terms of b (unless det(A)==0), but it's meaningless to ask someone to
> say "solve A", for exactly the same reason that it's meaningless to ask
> them to "solve A" when A == 5.
> You can ask them to invert A; if A is 5, that's just 1/5. If A is a
> matrix, that's more complicated; but that's not the same as asking them
> to "solve A".

If you're going to ignore what I write why did you reply?

I gave a perfectly good example of using that terminology [static
matrices] which you ignored to drone on about some off-topic math
related quibble.

Tom

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#27869

On 10/30/2012 05:47 PM, tom st denis wrote:
> If you're going to ignore what I write why did you reply?

I only ignored the parts that were irrelevant to the point of my reply,
such as the details of how to solve the equations that you didn't
actually specify should be solved. My comments were not about the
techniques for solving such equations, which I'm quite familiar with,
but with your failure to correctly describe an equation in need of solution.

I'm in rough agreement with your assessment of the inappropriateness of
the original question - I just wish you'd taken the trouble to state
your example in a way that actually made sense. However, I do think
you've overreacted. It's possible that he's too lazy to make any attempt
to solve it himself, but it's also possible that he has no clue how to
even get started on it. That could be because he's not competent to
pursue a career in computer programming; but it could also be that he
just hasn't had a couple of key insights yet, that will seem blindingly
obvious in retrospect when he reaches the same point in his career that
you've reached in yours. They might even seem so obvious that he might
not even remember not understanding them, just as you don't remember
being unable to understand them. You don't have enough information to
justify ruling out that possibility.

I used to tutor for a living, and I found that students each have their
own strengths and weaknesses; you can't just say "this is simpler than
that, so anyone who has trouble understanding this could never
understand that". It's just not that simple. For example, in your case,
solving linear equations is simple, but apparently you've not yet
mastered even the very basics of stating a problem that requires the use
of those skill to solve. That requires skill with English at least as
much as it does with mathematics.

> I gave a perfectly good example of using that terminology [static
> matrices].

More accurately, you gave an imperfect example of misusing that terminology.
-- 
James Kuyper

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