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 ...

Tell us what you think the answer is and we might confirm whether you are correct or not.

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];

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

Quote:

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Originally Posted by whiteflags

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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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 :(

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.

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

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

Why not ask your friend?

Quote:

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Originally Posted by loserone+_+

do u know this code use for what
setw
and #include<iomanip.h>

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That's C++.

Bye, Andreas

Quote:

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Originally Posted by loserone+_+

do u know this code use for what
setw
and #include<iomanip.h>
tell me about that

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It's gibberish.

Quote:

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Originally Posted by loserone+_+

i find it on my friend is computer, that is one of matrix he making

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• Why was the computer on your friend?
• Why do you describe his computer as a matrix that he's making?

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:

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int M[2][2] = {7,10,4,11};

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What logic do you need???
What operations would you like to perform on the said matrix???

Quote:

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Originally Posted by QuantumNut

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:

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int M[2][2] = {7,10,4,11};

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You might find

Code:

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int M[2][2] = {{7,10},{4,11}};

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works better.

Quote:

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Originally Posted by grumpy

You might find

Code:

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int M[2][2] = {{7,10},{4,11}};

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works better.

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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:

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Originally Posted by cyberfish

Why not ask your friend?

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Because he get the c code from others, he didnt understand that

Quote:

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Originally Posted by AndiPersti

That's C++.

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i see, its c++ thing, so its my mistake

Quote:

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Originally Posted by Barney McGrew

It's gibberish.

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lol, i dont know it gibberish or not

Quote:

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• Why was the computer on your friend?
• Why do you describe his computer as a matrix that he's making?

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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:

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Originally Posted by QuantumNut

Code:

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int M[2][2] = {7,10,4,11};

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What logic do you need???
What operations would you like to perform on the said matrix???

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Ah i confused to tell what is i need, and it is over yesterday,

Quote:

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Originally Posted by grumpy

You might find

Code:

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int M[2][2] = {{7,10},{4,11}};

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works better.

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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 :)