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kiran janaswamy wrote: please proivide me a solution if you have.
What's wrong with this?
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
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PSM_QUERYSIBLINGS[^]
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" - mYkel - 21 Jun '04
"There's not enough blatant self-congratulatory backslapping in the world today..." - HumblePie - 21 Jun '05
Within you lies the power for good - Use it!
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hi,
I want to generate random numbers in c++ (using vc++ 6.0) on hit of enter. I am using _kbhit(), but don't know how to reset it, so that I can use it again, can anybody help me with this.
code is say like following.
#include <iostream>
#include <conio.h>
#include <windows.h>
using namespace::std;
int main(int argc, char* argv[])
{
for(int i=0; i<10; i++)
{
cout << "hit enter to generate random number" << endl;
int ran1 = func1();
cout << "hit enter to generate random number" << endl;
int ran2 = func2();
}
return 0;
}
int func1()
{
int ret;
while(!_kbhit())
{
ret = rand()%10;
Sleep(1000);
}
return ret;
}
int func2()
{
int ret;
while(!_kbhit())
{
ret = rand()%20;
Sleep(1000);
}
return ret;
}
There is another problem with I/O exception handling:
i tried to read an int correctly using following code. but in case of exception it is caught but cin doesn't execute inspite of clearing it:
int main(int argc, char* argv[])
{
int i;
bool check = false;
cin.exceptions(ios_base::failbit);
while(!check)
{
try{
cout << "enter a number: ";
cin >> i;
check = true;
}catch(ios_base::failure){
cin.clear();
}
}
return 0;
}
Thanks,
vikas
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To reset kbhit() you must read the character.
if( kbhit() ) getch();
We used to have to do key debouncing like so:
while( kbhit() ) getch();
INTP
Every thing is relative...
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Are there any API's or macros that allow us to add a new device or uninstall it through our program... in MFC?  if not.. then how does the ADD/Remove harware wizard in control panel work? Thks
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Hey wsup y`all? am currently working on a university project invovling the design of a fully automated lathe machine. the hardware part and machine design is easy and done....now the only problem is designing the software to control the machine using the parallel port. the program,should have a simulation of the movement of the machine tip controled by stepper motors.any person good with 3d programming can help me a lot.halla back if your interested in the challenge of designing the software..
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I have worked on hardware interface projects
but will like to know details of ur project
first , then only i can help.
Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com
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Dear MFCExperts,
I have a dialog bar with icon moving on it. I use OnContextMenu Message to invoke a Menu for adding the icons. Now I want the delete some of icons.These icons are stored in a array. When I press key 'D', I want one of these icons to get deleted. I tried the OnChar message. But effect is not happening. The following the body of OnChar
Any suggestions Please,
void CTBMap::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
// TODO: Add your message handler code here and/or call default
switch(nChar)
{
case VK_DELETE:
m_pMarkers->m_ItemIndex--;
InvalidateRect(NULL,TRUE);
break;
default:
break;
}
CDialogBar::OnChar(nChar, nRepCnt, nFlags);
}
Thanks in advance
-- Manohar
Research Student.
IISc, Bangalore. India
http://ssl.serc.iisc.ernet.in/~manohar/
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I get the following compile warning:-
c:\TestProg\SigData.h(3625): warning C4146: unary minus operator applied to unsigned type, result still unsigned.
I am assigning the value -2147483648 to an int field in a structure.
Thanks.
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could you show the code that's crashing please ?
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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Sorry its just a compiler Warning, but was trying to get rid of it.
I have a structure:-
typedef struct <br />
{<br />
char scaling [SCALE_LENGTH];<br />
char format [FORMAT_LEN];<br />
char dataRaw [DATA_LEN];<br />
char dataEng [DATA_LEN];<br />
char display1 [DISPLAY_LEN];<br />
int base;<br />
int offset;<br />
int mask;<br />
int wordSize;<br />
int shift;<br />
int noFieldsBefore;<br />
int noFieldsAfter;<br />
double maximum;<br />
double minimum;<br />
double fullScale;<br />
}SIGNAL_DETAILS;<br />
<br />
And init:-<br />
<br />
SIGNAL_DETAILS signal_details[NO_FIELDS] = {<br />
"1",
"Integer",
"0",
"0",
"%04X",
382,
0,
-2147483648, <br />
32,
0,
0,
3,
255.000000 ,
0.000000 ,
255.000000 ,
,<br />
etc.
Its the Initialisation of mask to -2147483648 that causes the problem.
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why you are assigning value to an int,which falls out of its range?
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it is not out of range, it is exactly the lower bound of a 32-bits signed int :
2^32 = 4294967296
(2^32)/2 = 2147483648
so, signed int contains values into [-2147483648 ; +2147483647]
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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oops ! my mistake.
just careless reading.
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How about :
{
char scaling [SCALE_LENGTH];
char format [FORMAT_LEN];
char dataRaw [DATA_LEN];
char dataEng [DATA_LEN];
char display1 [DISPLAY_LEN];
int base;
int offset;
signed int mask;
int wordSize;
int shift;
int noFieldsBefore;
int noFieldsAfter;
double maximum;
double minimum;
double fullScale;
}SIGNAL_DETAILS;
~RaGE();
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Still the same compiler warning.
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ok, i've got it... just have a look at the MSDN[^] :
Practically, this occurs when the programmer is trying to express the minimum integer value, which is -2147483648. This value cannot be written as -2147483648 because the expression is processed in two stages:
1. The number 2147483648 is evaluated. Because it is greater than the maximum integer value of 2147483647, the type of 2147483648 is not int, but unsigned int.
2. Unary minus is applied to the value, with an unsigned result, which also happens to be 2147483648.
ah, that was so simple
just use INT_MIN instead of hard coding the value and don't forget to #include<limits.h>...
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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I tried 0x8000000 and it worked OK.
But thanks for your post.
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What compiler are you using? Are you building for Win32?
'int' is per definition signed and the range of the type is –2,147,483,648 to 2,147,483,647 in a 32-bit environment.
What happens if you change the radix of the value to hex and assign 0x80000000?
(Since this looks like a bit mask perhaps this is preferred anyway...)
--
Roger
It's supposed to be hard, otherwise anybody could do it!
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typedef struct MyTag {...} MyStruct;<br />
MyStruct MyArray[MYSIZE] = { {...}, {...}, etc.. };
Notice the embeded "{...}", each of these represent a seperate struct item in the array.
I suspect that because you are not doing this, each of the items that you enter (seperated by a ',') may be considered initialization of seprate item structures. I could be wrong about this, but I have seen this type of error many in my career, and the solution has always been the same.
INTP
Every thing is relative...
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how does components like DAO, ADO etc (for example) are made? is it through ATL?
in ATL we set or get properties like ,
Obj.Value (single . [dot])
but how to make things like
[vb]
dim rs as recordset
rs.fields.count
[/vb]
Here we have two 'dots'.. is it through passing structures ? or what DS?
i want to do like,
Obj.Values.count
how do i get the .cout after .Values?
Thanks
He is like a one-legged man in a bum kicking competition. -Novjot Sidhu
--[v]--
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you'll have a .count only if the .Values object is of a type that provides a count method.
moreover, vb is bad in that fact that properties don't always need parenthesis (()) when they are called ; i find this obfuscates the code...
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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mmmm..ok but is it possible to pass a C++ object to a VB Client thru 'methods'?
toxcct wrote: vb is bad in that fact that properties don't always need parenthesis (()) when they are called ; i find this obfuscates the code...
ya i'm an x-vb programmer, and i still use it for Client Applications that use COM, but i really dont like it  , though i find C++ a bit tougher , Satisfaction is really great.
He is like a one-legged man in a bum kicking competition. -Novjot Sidhu
--[v]--
-- modified at 6:46 Wednesday 19th October, 2005
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VivekuniQ wrote: is it possible to pass a C++ object to a VB Client thru 'methods'?
What do you mean ? You cannot have a C++ object into VB (like that I mean, you can use techologies like COM but that's another thing) so how do you want to make it pass thru methods ??
Maybe you are speaking about COM objects ? I don't really understand what you want to achieve...
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