Count elements within bounds in 2D array

Hi,

I'm trying to count the number of elements that contain numbers that lie within two boundry conditions in a 2D array.

So, if I have my data:

i j
10 100
20 200
30 300
40 400

I want to know how many rows (20<=i<=40 && 100<=j<=300). In this case 2. The arrays are also many lines long.

I thought that this would be really easy to do in a language that seems as powerfula nd flexible as C++ but......

Any ideas. Cheers.
Will

And what's the problem doing what you said?

Code:

---

//for each 2D number
if(20<=i<=40 && 100<=j<=300)
        //value is within
else
        //it's not

---

I think I don't undestand your problem!! Sorry!

Albert.

Quote:

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Originally Posted by AlbertGM

And what's the problem doing what you said?

Code:

---

//for each 2D number
if(20<=i<=40 && 100<=j<=300)
        //value is within
else
        //it's not

---

I think I don't undestand your problem!! Sorry!

Albert.

---

20<=i<=40 yields true whatever i is. It is interpreted as (20<=i)<=40
Same thing for 100<=j<=300

The correct condition is:

Code:

---

20<=i && i<=40 && 100<=j && j<=300

---

SuperKoko, you are always correcting me. I think I won't do any any other post, because all of them have errors :-)

Thanks for your answers and for correct me. It could be because today I've lunch with wine :-)

Albert.

Quote:

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Originally Posted by AlbertGM

SuperKoko, you are always correcting me. I think I won't do any any other post, because all of them have errors :-)

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Please, continue posting.

Doing errors in untested code is very usual. Personally, I can't write much code without any problem if I don't try to compile it.

With time, you'll do fewer errors on untested code.
:)

Quote:

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Originally Posted by AlbertGM

Thanks for your answers and for correct me. It could be because today I've lunch with wine :-)

---

It may be a factor. :)
Personally, I do many more errors when I'm sleepy.

PS: I tried to send this message as a PM but AlbertGM blocked PMs in his account.

Quote:

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Originally Posted by SuperKoko

Please, continue posting.

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Of course I'll do. I'm learning a lot :-)

Quote:

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Originally Posted by SuperKoko

PS: I tried to send this message as a PM but AlbertGM blocked PMs in his account.

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What's that? How I blocked that? How Can I unlock it?

Albert.

Quote:

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Originally Posted by AlbertGM

How I blocked that?

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I guess it is the default behavior.

Quote:

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Originally Posted by AlbertGM

How Can I unlock it?

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Go to the User CP page, click the User Options link, and then, activate "Enable Private Messaging", and finally, click "Save Changes".

This link should go to your user options page:
http://www.codeguru.com/forum/profil...do=editoptions