Thread: Matrix math logic with array! Need Fast Help!

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    Registered User loserone+_+'s Avatar
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    Matrix math logic with array! Need Fast Help!

    how to make matrix 2x2 with array?
    i had exam today and its about 30 minutes from now
    please tell me fast, just logic what i need ...

  2. #2
    Algorithm Dissector iMalc's Avatar
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    Tell us what you think the answer is and we might confirm whether you are correct or not.
    My homepage
    Advice: Take only as directed - If symptoms persist, please see your debugger

    Linus Torvalds: "But it clearly is the only right way. The fact that everybody else does it some other way only means that they are wrong"

  3. #3
    Registered User loserone+_+'s Avatar
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    i dont have the code right now by the way
    i just need logic to make matrix with array thing
    matrix in math
    example
    matrix a[2],b[2];

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    Lurking whiteflags's Avatar
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    You don't need code to explain matrix math; just look up what you don't know in math before the test. :s

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    Registered User loserone+_+'s Avatar
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    Quote Originally Posted by whiteflags View Post
    You don't need code to explain matrix math; just look up what you don't know in math before the test. :s
    really?
    its make matrix code is easy?
    what logic to make matrix a[2],b[2];
    and the result of the matrix
    please! only ten minutes i have until exam

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    Is his/her question very vague and unclear?
    I really could not answer the question because the question was contradictory. No idea if it is a programming or math question.
    No idea what matrix operations where being discussed.

    I just wondered if I was missing something, or do the rest of you think the question was too vague.

    Tim S.
    "...a computer is a stupid machine with the ability to do incredibly smart things, while computer programmers are smart people with the ability to do incredibly stupid things. They are,in short, a perfect match.." Bill Bryson

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    Lurking whiteflags's Avatar
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    It doesn't matter. Based on past experience and how the rules are applied we can't help people pass exams anyway.

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    Registered User loserone+_+'s Avatar
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    so it just depend on me anyway,
    actually i still had time to studying, the exam started at13.00 in my country

    do u know this code use for what
    setw
    and #include<iomanip.h>
    tell me about that
    i find it on my friend is computer, that is one of matrix he making

  9. #9
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    Why not ask your friend?

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    Quote Originally Posted by loserone+_+ View Post
    do u know this code use for what
    setw
    and #include<iomanip.h>
    That's C++.

    Bye, Andreas

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    Stoned Witch Barney McGrew's Avatar
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    Quote Originally Posted by loserone+_+ View Post
    do u know this code use for what
    setw
    and #include<iomanip.h>
    tell me about that
    It's gibberish.

    Quote Originally Posted by loserone+_+ View Post
    i find it on my friend is computer, that is one of matrix he making
    • Why was the computer on your friend?
    • Why do you describe his computer as a matrix that he's making?

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    the question is too vague, maybe the reason is he/she might not be able to express the problem in a proper way...
    you can create a 2x2 matrix like this...
    Code:
    int M[2][2] = {7,10,4,11};
    What logic do you need???
    What operations would you like to perform on the said matrix???

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    Quote Originally Posted by QuantumNut View Post
    the question is too vague, maybe the reason is he/she might not be able to express the problem in a proper way...
    you can create a 2x2 matrix like this...
    Code:
    int M[2][2] = {7,10,4,11};
    You might find
    Code:
    int M[2][2] = {{7,10},{4,11}};
    works better.
    Right 98% of the time, and don't care about the other 3%.

    If I seem grumpy or unhelpful in reply to you, or tell you you need to demonstrate more effort before you can expect help, it is likely you deserve it. Suck it up, Buttercup, and read this, this, and this before posting again.

  14. #14
    C++ Witch laserlight's Avatar
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    Quote Originally Posted by grumpy
    You might find
    Code:
    int M[2][2] = {{7,10},{4,11}};
    works better.
    They should both work the same, unless there is a bug in the compiler, except that being more explicit tends to make it easier to understand and less likely that a compiler might warn about a potential bug.
    Quote Originally Posted by Bjarne Stroustrup (2000-10-14)
    I get maybe two dozen requests for help with some sort of programming or design problem every day. Most have more sense than to send me hundreds of lines of code. If they do, I ask them to find the smallest example that exhibits the problem and send me that. Mostly, they then find the error themselves. "Finding the smallest program that demonstrates the error" is a powerful debugging tool.
    Look up a C++ Reference and learn How To Ask Questions The Smart Way

  15. #15
    Registered User loserone+_+'s Avatar
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    Quote Originally Posted by cyberfish View Post
    Why not ask your friend?
    Because he get the c code from others, he didnt understand that
    Quote Originally Posted by AndiPersti View Post
    That's C++.
    i see, its c++ thing, so its my mistake
    Quote Originally Posted by Barney McGrew View Post
    It's gibberish.
    lol, i dont know it gibberish or not
    • Why was the computer on your friend?
    • Why do you describe his computer as a matrix that he's making?
    lol, what do u mean computer in your question? if u ask OS, its windows 7
    lol i didnt describe his computer, i describe the code he was making, and i wonder #include<iomanip.h> and setw()i s for what?
    Quote Originally Posted by QuantumNut View Post
    Code:
    int M[2][2] = {7,10,4,11};
    What logic do you need???
    What operations would you like to perform on the said matrix???
    Ah i confused to tell what is i need, and it is over yesterday,
    Quote Originally Posted by grumpy View Post
    You might find
    Code:
    int M[2][2] = {{7,10},{4,11}};
    works better.
    lol i see that, and to printing variables just using printf right

    The exam was over and i cant answer the question but its not a big problem

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