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bPulseStream.add(0xdb);
bpulsestream is of type CBytearray
This is used to generate a 40Khz IR pulse.
Here's the full code -
#define CharWidth 73<br />
<br />
bPulsestream.Setsize(charwidth*4, 16); <br />
<br />
for(int i=0; i < charwidth*4; i++)<br />
<br />
{<br />
bpulsestream.Add(0xdb);<br />
<br />
}
Thanks in advance.
-hithesh
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hithesh wrote:
Thanks in advance.
Thanks for what? You did not mention what you needed help with.
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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Can someone explain why charwidth is 73 and why is bPulsestream 0xdb. If someone can decipher that code, it would be great.
-hithesh
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The code snippet you provided, while syntactically incorrect, generates nothing and has nothing to do with IR pulses. It simply adds the value 0xdb to a CByteArray object 292 times.
You'll need to consult the source of this code to figure out how and why those specific values are used.
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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I am using a read-only edit control to display a log file on a property page, but on w9x I am getting EN_ERRSPACE errors if the file is much over 62K. Now I can handle this by stopping reading the file at the 62K mark if running w9x, but I really would like a workaround to be able to display the entire file. I am using an edit control for it's built in text selection and clipboard support.
Would a rich edit control be better? or does it suffer from the same limitations?
What is the text size limit for w2k/xp? Do I also have to limit the log file on those platforms?
I have read in MSDN[^] that one can use the DS_LOCALEDIT dialog style (Can one use that style on a single property page, or does it then apply to all pages?) and the EM_GETHANDLE and EM_SETHANDLE messages to manage the memory yourself. But looking up DS_LOCALEDIT in MSDN[^] it says that DS_LOCALEDIT only applies to 16 bit windows, which makes it rather useless.
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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PJ Arends wrote:
Would a rich edit control be better?
Yes.
PJ Arends wrote:
or does it suffer from the same limitations?
No.
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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Thanks, rich edit control it will be.
Now I just have to figure out how to use one of them things
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
Honoured as one of The Most Helpful Members of 2004
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I'm trying to write a Unicode Filename, both the filename and the data in the file are Unicode. I thought that I should use wofstream to do this. Does anyone know why wofstream only takes a const char * and not unicode? Is there another way to open a file to write to that I can use Unicode chars in its name?
This is the error I get from the following line of code.
wofstream outfile(pFileName);
error C2664: '__thiscall std::basic_ofstream<unsigned short,struct="" std::char_traits<unsigned="" short=""> >::std::basic_ofstream<unsigned short,struct="" std::char_traits<unsigne
d="" short=""> >(const char *,int)' : cannot convert parameter 1 from 'unsigned short *' to 'const char *'
There has to be a way to create a file with a unicode name or there is no point lol
thanks for any help regarding this.
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I recently saw something like this, and was wondering what's the benefit.
struct MyStruct
{
// etc.
};
Later on in the program, I saw:
struct MyStruct* pMyStruct;
===================
What's the point of using the 'struct' keyword (a second time) to define a pointer to a structure that's already defined? It compiles fine, but what purpose does it serve?
Any sensible explanation will be appreciated.
William
Fortes in fide et opere!
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It was required in C, but not in C++. Old habits die hard, I guess.
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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You see quite a bit of C-style coding in C++. And I find that it just makes maintaining C++ even more horrible than it actually is.
Kevin
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Yep. I cringe whenever I run across the old
typedef struct StructName {
} StructName;that I used to have to do in C all of the time.
Software Zen: delete this;
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Hi,
I´m using VS.NET 2003 and I´m having some odd linking errors and I would appreciate if anyone could explain to me why, and how I could solve this.
I´ve done this simple example to show you what I mean.
car.h<br />
#pragma once<br />
#include <iostream><br />
using namespace std;<br />
<br />
void decfunc();<br />
char *msg;
car.cpp
#include "car.h"<br />
<br />
void decfunc()<br />
{ <br />
msg = new char[12];<br />
msg = "Hello world!";<br />
}
main.h
#include "car.h"<br />
using namespace std;
main.cpp
#include "main.h"<br />
<br />
void main()<br />
{<br />
decfunc();<br />
cout << msg;<br />
}
The link errors I receive are:
tests error LNK2005: "char * msg" (?msg@@3PADA) already defined in main.obj
tests fatal error LNK1169: one or more multiply defined symbols found.
Thanks!
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add following lines to car.h:
#if !defined(_CAR_H)
#define _CAR_H
...
your previous code
...
#endif
so char*msg will be defined only once.
I hope it will help 
Marcin Wojciechowski
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Hi Marcin, thanks for your reply
acctualy, it didnt work. My car.h now looks as follows:
#if defined(_CAR_H)<br />
#define _CAR_H<br />
<br />
#include <iostream><br />
using namespace std;<br />
<br />
void decfunc();<br />
char *msg;<br />
<br />
#endif
and I still get the same link errors
error LNK2005: "char * msg" (?msg@@3PADA) already defined in car.obj
fatal error LNK1169: one or more multiply defined symbols found
I´m having a hard time seeing what makes it being defined twice.
Does it have something to do with the decfunc-function perhaps?
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In car.h:
extern char *msg;
In car.cpp:
char *msg = NULL;
...cmk
Save the whales - collect the whole set
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great! Thanks. 
humpa humpa
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I want to write a program to show a BMP , which is so big that the PC has not enough memory to load , can you give me some clews ? if you have the code please mail me , thanks a lot .
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#include<iostream.h>
#include<iomanip.h>
#include<math.h>
void optimization(double x[3][2]);
double power(double x,int n);
double F(double x[2]);
double fun(double x[3][2],double xm[2] );
double a,k,b,v,E,p,q,y;
double x[3][2],fx[3],*xh,*xl,*xg;
double temp,fxh,fxl,fxg,fxm,fxr,fxe,fh1,fxc;
double xm[2],xr[2],xe[2],xh1[2],xc[2];
void main()
{
cout<<"输入边长值："; cin>>a; cout<<"输入反射系数："; cin>>k; //输入原始数据
cout<<"输入收缩系数："; cin>>b; cout<<"输入扩伸系数："; cin>>v;
cout<<"输入容差：";cin>>E; cout<<"输入的初始顶点：";
cin>>x[0][0]>>x[0][1];
p=(sqrt(2+1)+2-1)*a/(sqrt(2)*2); q=(sqrt(2+1)-1)*a/(sqrt(2)*2); //建立初始单纯形
x[1][0]=x[0][0]+p; x[1][1]=x[0][0]+q; x[2][0]=x[0][0]+q; x[2][1]=x[0][0]+p;
optimization(x);
}
double F(double x[2])
{
double f;
f=3*power(x[0],2)+power(x[1],2)-12*(x[0])-8*(x[1]);
return f;
}
double power(double x,int n)
{
int i; double p=1.0;
for(i<1;i<=n;i++)
p=p*x;
return p;
}
void optimization(double x[3][2])
{
fx[0]=F(x[0]); fx[1]=F(x[1]); fx[2]=F(x[2]);
for( int i=0;i<3;i++)
{
for(int j=1;j<2-i+1;j++)
{
if(fx[i]<=fx[i+j])
{
temp=fx[i];
fx[i]=fx[i+j];
fx[i+j]=temp;
}
}
fxh=fx[0]; fxg=fx[1]; fxl=fx[2];
}
for(i=0;i<3;i++)
{
if(F(x[i])==fxh) xh=x[i];
if(F(x[i])==fxg) xg=x[i];
if(F(x[i])==fxl) xl=x[i];
}
xm[0]=(xg[0]+xl[0])/2; xm[1]=(xg[1]+xl[1])/2; fxm=F(xm); // 计算反射中心
xr[0]=(1+k)*xm[0]-k*xh[0]; xr[1]=(1+k)*xm[1]-k*xh[1];fxr=F(xr); //计算反射点
if(fxr>=fxl&&fxr<fxg)
{
="" xh[0]="xr[0];xh[1]=xr[1];
" if(fun(x,xm)<e)
="" cout<<"最优解为："<<xm[0]<<endl<<"最小值为："<<fxm<<endl;
="" else="" optimization(="" x);
if(fxr<fxl)
="" xe[0]="(1-v)*xm[0]+v*xr[0];
" xe[1]="(1-v)*xm[1]+v*xr[1];
" fxe="F(xe);
" if(fxe<fxr)
="" xh[1]="xe[1];
" if(fun(x,xm)<e)=""
="" optimization(x);
="" }
="" else
="" }
="" if(fxr="">=fxg)
{
fh1=fxr<=fxh? fxr:fxh;
if(fxr<=fxh)
{
xh1[0]=xr[0];xh[1]=xr[1];
}
else
{
xh[0]=xh[0];
xh1[0]=xh[1];
}
xc[0]=(1-b)*xm[0]+b*xh[0];
xc[1]=(1-b)*xm[1]+b*xh[1];
if(fxc<=fh1)
{
xh[0]=xc[0];
xh[1]=xc[1];
if(fun(x,xm)
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While you failed to indicate what mistakes needed correcting, I would suggest using more meaningful names than x, y, z, and variants thereof. Your code is next to impossible to read.
"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown
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i make one program for ivrs purpose.in which for database connectivity i use CRecordSet class fuction .in which i access 6 TABLES at a time for data manipulation. at this time cpu goes 100% and upto 15 seconds exe hangup.so another user dont able to access this exe file .so plz tell me can i make data retrival fast by any other method
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Hi
I suggest u to use another Thread for database retrival while ur main msg loop handle user and system msgs.
also if u make a single QUERY for 6 table if it is possible it make ur jobs faster.
Bye
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I need:
*) Get Handle of Main Window from process handle (I know the process handle).
or:
*) Get process info (i.e. process ID or handle) from a Window handle (I know the window handle).
any solution for 2 questions above is helpful - first is prefered.
thx
includeh10
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Answer to your 2. question:
DWORD dwProcessId = 0;<br />
GetWindowThreadProcessId (hWnd, &dwProcessId);<br />
HANDLE hProcess = NULL;<br />
hProcess = OpenProcess (PROCESS_ALL_ACCESS, FALSE, dwProcessId);
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1.
- Use GetProcessId() to get process id from process handle.
- Use EnumWindows() to look at each top-level window.
- For each top-level window call GetWindowThreadProcessId() to get the thread id and process id that was used to create the window.
- Break when you find a top-level window that was created by the specified process handle/id.
2.
- Use GetWindowThreadProcessId() to get the thread id and process id that was used to create the window.
...cmk
Save the whales - collect the whole set
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