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Re: reverse division to convert decimals to dinary

Omegaclass1-Nov-09 10:10

1-Nov-09 10:10

thank you very much, i will play with this code and see what i can do with this new information.

you said you multiplied by 8, but i see only 3 could you explain this, if it was a typo then never mind

Re: reverse division to convert decimals to dinary

CPallini1-Nov-09 10:13

CPallini

1-Nov-09 10:13

You are welcome.
Smile | :)

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Re: reverse division to convert decimals to dinary

Omegaclass1-Nov-09 12:28

Omegaclass

1-Nov-09 12:28

i figured out what you meant by multiply by 8, it would be 2^3 which is 8 and what i seen in your code was 3. it seems this is a cool way to multiply and divide

i hope this thread helps someone else learn something new as i did, thanks

Re: reverse division to convert decimals to dinary

David Crow2-Nov-09 4:08

David Crow

2-Nov-09 4:08

There are many ways to do this. To use what you already have, add:

char s[128] = { '\0' };
int x = 0;
  
while (num)
{	
    s[x] = (num & 1) ? '1' : '0';	
    num = num / 2; // num >>= 1
    x++;
}
  
cout << strrev(s) << endl;

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Re: reverse division to convert decimals to dinary

Omegaclass2-Nov-09 17:15

Omegaclass

2-Nov-09 17:15

its funny i was reading about arrays today and ways to reverse the output, had nothing yet, but i did learn how to make an array. what header files did you use? when i compile your modification to my code i get an unrecognizable output.

thank you.

#include "stdafx.h"
#include <iostream>
using namespace std;

int main()
{

char s[128];
int x = 0;
int num =53
  
while (num)
{	
    s[x] = (num & 1) ? '1' : '0';	
    num = num / 2; // num >>= 1
}
  
cout << strrev(s) << endl;
system("pause");
return 0;
}

Re: reverse division to convert decimals to dinary

David Crow3-Nov-09 2:44

David Crow

3-Nov-09 2:44

Have you used the debugger to step through the code watching s and num?

Re: reverse division to convert decimals to dinary

Omegaclass3-Nov-09 19:08

Omegaclass

3-Nov-09 19:08

i haven't looked at the debugger messages, maybe i should, but as a beginner i may not even know what i am seeing so i will look into this. thanks

Ugly Numbers Error

anollipian31-Oct-09 14:21

anollipian

31-Oct-09 14:21

HI
Would U plz help me with this Code
I cant find the Error !!
here's the Question:-http://uva.onlinejudge.org/external/1/136.html[^]
here's the code .. "that shows a wrong output"

#include<iostream>
#include<list>
using namespace std; 
int main ()
{
	int uglylist[1500];
	uglylist[0]=1;
	
	int maximum;
	    int max2=0;
		int max3=0;
		int max5=0;
	for(int i = 1; i<1500; i++)
	{
		maximum =uglylist[i-1];
		
		for(int j=0;j<=i;j++)
		{
			if (uglylist[i]>max2)
			{
				max2=uglylist[j]*2;
				break ; 
			}

			if (uglylist[i]>max3)
			{
				max3=uglylist[j]*3;
				break ; 
			}
			if (uglylist[i]>max5)
			{
				max5=uglylist[j]*5;
				break ; 
			}
			uglylist[i]=min(max2,min(max3,max5));
		}
	}
		cout<<uglylist[1500-1]<<endl;

}

So Would U plz help ?

Re: Ugly Numbers Error

LunaticFringe31-Oct-09 14:30

LunaticFringe

31-Oct-09 14:30

Would U plz do your own homework?

Dead | X|

Re: Ugly Numbers Error

anollipian31-Oct-09 14:44

anollipian

31-Oct-09 14:44

well actually i didnt ask u to do it for me
& i guess u can c that i've already written the code
if u can help .. just do it
else :- dont come to disturb my post !!

Re: Ugly Numbers Error

Luc Pattyn1-Nov-09 3:59

Luc Pattyn

1-Nov-09 3:59

anollipian wrote:
i've already written the code

No. You have written some code, however your algorithm is flawed.

Smile | :)

Luc Pattyn

I only read code that is properly indented, and rendered in a non-proportional font; hint: use PRE tags in forum messages

Re: Ugly Numbers Error

David Crow31-Oct-09 16:26

David Crow

31-Oct-09 16:26

anollipian wrote:
So Would U plz help ?

Have you used the debugger to step through the code? Narrow the problem down from 1,500 to something more manageable.

2 Errors

MrMcIntyre31-Oct-09 6:09

MrMcIntyre

31-Oct-09 6:09

Hi,

I have got 2 errors one saying:

this line contains a '{' which has not yet been matched
end of file found before the left brace '{

<br />
#include <windows.h><br />
<br />
//Global Definitions<br />
#define WINDOW_WIDTH 903<br />
#define WINDOW_HEIGHT 729<br />
<br />
//Global Variables<br />
const char lpClassName[] = "MyProject";<br />
HWND mainWindow;<br />
<br />
//Function Declarations<br />
LRESULT CALLBACK WindowEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);<br />
<br />
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)<br />
{<br />
	//Create The Window Class<br />
	WNDCLASSEX wc;<br />
	wc.style = CS_VREDRAW | CS_HREDRAW;<br />
	wc.lpszMenuName = NULL;<br />
	wc.lpszClassName = lpClassName;<br />
	wc.lpfnWndProc = WindowEvent;<br />
	wc.hInstance = hInstance;<br />
	wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);<br />
	wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);<br />
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);<br />
	wc.hbrBackground = (HBRUSH) GetStockObject(BLACK_BRUSH);<br />
	wc.cbWndExtra = 0;<br />
	wc.cbSize = sizeof(wc);<br />
	wc.cbClsExtra = 0;<br />
<br />
<br />
	//Register The Windows Class<br />
	RegisterClassEx(&wc);<br />
<br />
	//Create the Window<br />
	mainWindow = CreateWindowEx(<br />
		NULL,<br />
		lpClassName,<br />
		"My Project",<br />
		WS_OVERLAPPEDWINDOW | WS_VISIBLE,<br />
		0,<br />
		0,<br />
		WINDOW_WIDTH,<br />
		WINDOW_HEIGHT,<br />
		NULL,<br />
		NULL,<br />
		hInstance,<br />
		NULL<br />
		);<br />
<br />
	//Make Sure The Window Was A Success<br />
	if (!mainWindow)<br />
		return 0;<br />
<br />
	//Update the Window<br />
	UpdateWindow(mainWindow);<br />
<br />
	//The Main Loop<br />
	MSG msg;<br />
<br />
	while (1)<br />
	{<br />
		if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))<br />
		{<br />
			if (msg.message == WM_QUIT)<br />
			<br />
			TranslateMessage(&msg);<br />
			DispatchMessage(&msg);<br />
	}<br />
<br />
<br />
	return (int) msg.wParam;<br />
}<br />
	//Callback Function (WindowEvent)<br />
	LRESULT CALLBACK WindowEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)<br />
	{<br />
		switch (message)<br />
		{<br />
		case WM_DESTORY:<br />
			PostQuitMessage(0);<br />
			return 0;<br />
			break;<br />
<br />
		<br />
		return DefWindowProc(hWnd, message, wParam, lParam);<br />
	}<br />
<br />
<br />

Andrew McIntyre

Re: 2 Errors

C^hris L^osinger31-Oct-09 6:10

C^hris L^osinger

31-Oct-09 6:10

you need to close the { in that last switch

image processing toolkits | batch image processing

Re: 2 Errors

enhzflep31-Oct-09 6:17

enhzflep

31-Oct-09 6:17

You also forgot to close braces after while(1)

(add another after the translate,dispatch pair)

Re: 2 Errors

MrMcIntyre31-Oct-09 6:25

MrMcIntyre

31-Oct-09 6:25

Could you show me on the code where to place the { symbol as I am kinda struggling to locate it.

If you can create quick snippet of the part of the code so I can just copy that fix into my source code.

Thanks

Andrew McIntyre

Re: 2 Errors

enhzflep31-Oct-09 6:36

enhzflep

31-Oct-09 6:36

Sure thing.

There's actually another one that neither of us mentioned yet too - you mean WM_DESTROY, not WM_DESTORY

Substitute part of your code for this:

    while (1)
    {
        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            if (msg.message == WM_QUIT)
                TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }
    return (int) msg.wParam;
}
//Callback Function (WindowEvent)
LRESULT CALLBACK WindowEvent(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)
    {
        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;
        break;
    }
    return DefWindowProc(hWnd, message, wParam, lParam);
}

There's other things amiss too, though this will give you a window that opens.

Re: 2 Errors

MrMcIntyre31-Oct-09 6:40

MrMcIntyre

31-Oct-09 6:40

Thanks very much you guy's. Its much appreciated.

Andrew McIntyre

Re: 2 Errors

David Crow31-Oct-09 16:33

David Crow

31-Oct-09 16:33

If you are using VS6, click Ctrl+] to locate matching braces (which will indirectly show you unmatched braces). I know there's a similar way in VS200x, but I don't know it off the top of my head.

Functional Parameters

Paul Belikian31-Oct-09 3:59

Paul Belikian

31-Oct-09 3:59

I've seen functions defined as:

int SetIniString(int nConfigSet, char *Section, char *Key, const char *format, ... );

Could someone explain what the '...' in the parameter list means and does?

Re: Functional Parameters

Randor 31-Oct-09 4:08

Randor

31-Oct-09 4:08

Hi Paul,

That allows the function to accept a dynamic argument list.

va_arg, va_end, va_start[^]

Best Wishes,
-David Delaune

Re: Functional Parameters

Paul Belikian31-Oct-09 4:20

Paul Belikian

31-Oct-09 4:20

Thank you David, for the explanation and link!

Re: Functional Parameters

Richard MacCutchan31-Oct-09 4:11

Richard MacCutchan

31-Oct-09 4:11

Paul Belikian wrote:
Could someone explain what the '...' in the parameter list means and does?

It means that the function also accepts zero or more parameters following the last named parameter. The function will then use some information passed by the caller (in this case the %x specifications in the format string) and the va_arg[^] functions, to access the extra parameters.

Re: Functional Parameters

Paul Belikian31-Oct-09 4:21

Paul Belikian

31-Oct-09 4:21

Thank you too Richard, I appreciate your response!

How to find unallocated sector in a disk programaticaaly

Shiv Murti Pal31-Oct-09 2:24

Shiv Murti Pal

31-Oct-09 2:24

hi all

i am developing an application in which i need to find a sector that does not allocated space by a file or folder.

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