Forum: C++  Oct 7th, 2008 |
| Replies: 5 Views: 222 Re: triangles of matrix
Oh, well in that case, how are you storing the matrix? Probably an array of numbers, I would guess.
If you are just starting, might be easiest to use a 2D array; declare an mxn array of integers... |
| Forum: C++ Oct 7th, 2008 |
| Replies: 5 Views: 222 Re: triangles of matrix
Do you mean you need to print the LU factorization of the matrix?
if so, perhaps this (http://en.wikipedia.org/wiki/LU_decomposition) page might be of some assistance... |
| Forum: C++ Jul 29th, 2008 |
| Replies: 6 Views: 324 Re: Object creation question
Well, if you want to get technical, it has to do with how you are referencing each object at the memory level (and understanding of this depends on how much you know about memory models). ... |
| Forum: C++ Jul 29th, 2008 |
| Replies: 5 Views: 292 Re: Bool problem
Since Addition is a boolean value, you could also simply code:
if (Addition) { //do whatever }
That is of course unless you are attempting to make the boolean value true...which would defeat the... |
| Forum: C++ Jul 29th, 2008 |
| Replies: 7 Views: 289 Re: I need help, wise sages...
yup yup of course in that case, if you ever computed a sum of 12 (two 6's), numInstances[sum] would actually be out of bounds (no error though, so be careful). So...you would have to store it in... |
| Forum: C++ Jul 28th, 2008 |
| Replies: 8 Views: 322 |
| Forum: C++ Jul 28th, 2008 |
| Replies: 8 Views: 322 |
| Forum: C++ Jul 28th, 2008 |
| Replies: 8 Views: 322 |
| Forum: C++ Jun 30th, 2008 |
| Replies: 7 Views: 1,619 Re: Difference between C and C++
Well...those links have a lot of the differences. I think basically C++ is an extension of C with added features. You can still use C code in C++, and code in a "C-Style", but C++ has features that... |
| Forum: C++ Jun 27th, 2008 |
| Replies: 16 Views: 709 Re: 2 dimensional array construction
What have you tried so far? Any thoughts on the subject? Do you know how to declar a multidimensional array, or a single-dimensional array for that matter? Do you know what a conditional (if)... |
| Forum: C++ Jun 27th, 2008 |
| Replies: 7 Views: 438 Re: Prime Patterns
Yes, Shaun is correct. However there is more...A related theorem says that every number is either prime itself, or else is a product of primes. I forget who proved this (Euclid?) but here is a... |
| Forum: C++ Jun 26th, 2008 |
| Replies: 2 Views: 137 Re: please help my proj. tic-tac-toe
OK that is a really open ended question...Before I (or anyone else) can even begin to help, we need to know a few things:
1) When you say user to user, do you mean like across a network? On the... |
| Forum: C++ Jun 20th, 2008 |
| Replies: 6 Views: 258 Re: Completely customised GUI?
I do apologize. Permit me to clarify:
I think I went on at length about how this might restrict the types of things you will be able to accomplish...until you get more experience/depending on how... |
| Forum: C++ Jun 20th, 2008 |
| Replies: 6 Views: 258 Re: Completely customised GUI?
You know, it seems that introducing GUIs to the beginner programmer is a little bit like opening pandora's box. I mean, I'm not saying that in doing so we release all the evils of programming... It... |
| Forum: C++ Jun 19th, 2008 |
| Replies: 3 Views: 274 Re: Good memory-practice site?
I literally googled "C++ memory management" and here is what I found:
one (http://www.cantrip.org/wave12.html?seenIEPage=1), two (http://www.mycplus.com/cplus.asp?CID=42), three... |
| Forum: C++ Jun 19th, 2008 |
| Replies: 4 Views: 657 Re: map Vs simple array
A Hashmap is basically a combination of an array and a list:
Suppose you had a whole bunch of keys. The way a hashmap works is basically, you reduce the keys mod some fairly large prime number (say... |
| Forum: C++ Jun 6th, 2008 |
| Replies: 25 Views: 3,149 |
| Forum: C++ Jun 6th, 2008 |
| Replies: 7 Views: 491 Re: Memory Allocation Understanding, new []()
Right, I was compiling on VC++ 08...I think it looks cleaner this way too.
Anyway, it didn't even cross my mind that it would be parsed as a binary shift...
And I actually meant that, in the... |
| Forum: C++ Jun 6th, 2008 |
| Replies: 7 Views: 491 |
| Forum: C++ Jun 5th, 2008 |
| Replies: 2 Views: 221 Re: need help understanding the problem
I think you generate 100 random numbers in the range 1 to 200, and store them in an array.
Then you do 100 searches, each time generating a new random number, and using this newly generated random... |
| Forum: C++ May 28th, 2008 |
| Replies: 11 Views: 441 Re: Recursion
Just so you know, if you write *crafty* recursive code, a.k.a. tail recursive functions, your compiler should optimize for recursion and use less stack space (i.e. reuse stack space)...the equivalent... |
| Forum: C++ May 28th, 2008 |
| Replies: 11 Views: 441 |
| Forum: C++ May 25th, 2008 |
| Replies: 6 Views: 2,496 |
| Forum: C++ May 24th, 2008 |
| Replies: 1 Views: 322 Re: implementation os stack
LIFO.
Stack using arrays...? It might be a better exercise to implement a stack struct (that can be easily resized and whatnot). But if you really want...then I guess we could work through one... |
| Forum: C++ May 24th, 2008 |
| Replies: 5 Views: 510 Re: deleting an element in a linked list
Sorry I didn't realize this hadn't been solved. I don't have time atm (I'll be out and about all day...), but I will sit down later tonight and help you out, unless someone else has fixed up your... |
| Forum: C++ May 23rd, 2008 |
| Replies: 8 Views: 241 Re: Not Quite Sure How I Would Do This?
Essentially you are extending the triangular number sequence: 1, 3, 6, 10, 15, ... (i.e. each number is the number of asterisks printed so far). Here is the... |
| Forum: C++ May 23rd, 2008 |
| Replies: 11 Views: 1,415 Re: Draw shapes in C++
Right, well, I'm not sure I understand what you are asking...
Which shapes do you need to learn how to draw? Just a square/triangle? That would be where I would start...
Assuming your exam is a... |
| Forum: C++ May 23rd, 2008 |
| Replies: 11 Views: 955 Re: Diagram in C++
C# and C++ have very similar syntax (C# came after, and is based on Java and by extention C++). C# was designed around the .NET framework (which I actually really like, from what I... |
| Forum: C++ May 23rd, 2008 |
| Replies: 3 Views: 290 Re: Another Bank Account class
What do you mean? What specifically are you having difficulty with...Also, does your code compile? If not, where are the issues...
If you are bent on making console menus, you may be interested... |
| Forum: C++ May 23rd, 2008 |
| Replies: 11 Views: 1,415 Re: Draw shapes in C++
Or else you do a few math calculations, then set up a function to draw individual shapes....
For example, you could create a "square" function:
void draw_square(int sideLength);
which basically... |
| Forum: C++ May 22nd, 2008 |
| Replies: 3 Views: 293 Re: panel
Perhaps you need to update the label text as you update the progress bar value...in the same iteration... |
| Forum: C++ May 22nd, 2008 |
| Replies: 1 Views: 208 Re: Checking string content
I'm afraid that, even if you found some function in some library somewhere, it's implementation would still be O(n) (where n is the number of characters)....After all, a string is just an array of... |
| Forum: C++ May 22nd, 2008 |
| Replies: 4 Views: 240 Re: need help in stack within stack....
I tend to think with pointers because I started with C...and pointers are commonplace in C...and thats how I learned...lol. But my thoughts were this: the elements in a stack may in fact be objects... |
| Forum: C++ May 22nd, 2008 |
| Replies: 4 Views: 240 Re: need help in stack within stack....
I have a potential solution...though you may not like it (and I haven't fully implemented it, so there could be some leaks):
1) In your stack class, in the private field, in the node struct, change... |
| Forum: C++ May 22nd, 2008 |
| Replies: 2 Views: 188 Re: When to use pointer and when not??
The difference is just in the way you are storing them, at the memory level. For example, suppose you had the following memory model:
Address Contents
... ... |
| Forum: C++ May 21st, 2008 |
| Replies: 19 Views: 1,107 Re: Problems dividing a number
Well, you could use the idea of integer division, i.e. a|b ("a divides b"), and remainders...
So for example, we say "3 divides 10" 3 times, with a remainder of 1. So you could take the floor of... |
| Forum: C++ May 21st, 2008 |
| Replies: 19 Views: 1,107 Re: Problems dividing a number
absolutely you can do this. As was stated previously, you can explicitly tell C++ to hold onto the decimal portion. For example:
int n1 = 10;
int n2 = 3;
cout << (double)n1/n2 << endl;
//Note: ... |
| Forum: C++ May 21st, 2008 |
| Replies: 9 Views: 455 Re: Elementary Class/const Question
Pass by reference works much the same as passing an array in Java. In fact, when you supply an array as an argument in Java, you don't actually copy the array, you just pass the address (believe it... |
| Forum: C++ May 21st, 2008 |
| Replies: 4 Views: 243 Re: Debugging - input validation
This is exactly what you should expect. C++ implicitly converts (or rather truncates) the decimal portion to the integer. It is equivalent to using a floor() function..
So if you try to stick... |
| Forum: C++ May 21st, 2008 |
| Replies: 4 Views: 243 Re: Debugging - input validation
Unless I'm missing something, I think you answered your own question here...after all, integers are not real numbers or rational numbers (i.e. no decimals allowed). They are simply all the numbers... |
