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  1. February 16th, 2012 07:48 AM #1
    hemanth144
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    shifting a 32bit in a array!!!!

    how to shift a 32bit array in C++? for this i need a c++ programming!!!
    pl help me in this!!!!
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  2. February 16th, 2012 07:57 AM #2
    S_M_A
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    Re: shifting a 32bit in a array!!!!

    Shift what and how? Do you think of the array as an integer > 32 bits that should be shifted?
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  3. February 16th, 2012 03:09 PM #3
    hemanth144
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    Re: shifting a 32bit in a array!!!!

    array contains binary number of length-32!!!! how to do shifting of those binary numbers!!!!
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  4. February 16th, 2012 03:13 PM #4
    hemanth144
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    shifting a 32bit in a array!!!!

    array contains binary number of length-32!!!! how to do shifting of those binary numbers!!!![it has to shift from left to right].
    int p[32]={1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0}
    how to do shifting of this array?
    Last edited by hemanth144; February 16th, 2012 at 04:05 PM.
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  5. February 16th, 2012 03:14 PM #5
    Lindley
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    Re: shifting a 32bit in a array!!!!

    Show us some code. It still isn't clear exactly what the type or size of this array is.
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  6. February 17th, 2012 01:29 AM #6
    Igor Vartanov's Avatar
    Igor Vartanov
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    Re: shifting a 32bit in a array!!!!

    Not sure if vector is an appropriate replacement in your case...
    Code:
    #include <vector>
#include <string>
#include <iostream>

#define COUNTOF(x)  (sizeof(x)/sizeof(x[0]))

template <typename T>
void DumpVect(std::vector<T>& v)
{
	// dump size
	std::cout << "*[" << v.size() << "] ";

	// dump elements
	for (int idx = 0; idx < v.size(); idx++)
	{
		if (idx)
			std::cout << ",";
		std::cout << v.at(idx);
	}
	
	std::cout << std::endl;
}

template <typename T>
void ShiftVect(std::vector<T>& v, T begval)
{
	// shift left to right
	v.erase(v.end() - 1);          // erase rightmost element
	v.insert(v.begin(), begval);   // insert begval as the first element
}

int main(int argc, char** argv)
{
	bool shift = true;

	if (argc > 1)
	{
		std::string action = argv[1];
		if (action == "rotate")
			shift = false;
	}
	
	// source array
	int p[32]={1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0};
	std::vector<int> v;
	
	// fill the vector
	for (int idx = 0; idx < COUNTOF(p); idx++)
		v.push_back(p[idx]);

	DumpVect(v);
	std::cout << std::endl;

	// drive on
	for (int idx = 0; idx < COUNTOF(p); idx++)
	{
		int begval = shift ? 0 : *(v.end() - 1);
		ShiftVect(v, begval);  // 0              - shift
		                       // *(v.end() - 1) - rotate
		DumpVect(v);
	}

	return 0;
}
    Code:
    E:\Temp\643>643
*[32] 1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0

*[32] 0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1
*[32] 0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1
*[32] 0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0
*[32] 0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1
*[32] 0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1
*[32] 0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0
*[32] 0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1
*[32] 0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1
*[32] 0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0
*[32] 0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1
*[32] 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
    Code:
    E:\Temp\643>643 rotate
*[32] 1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0

*[32] 0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1
*[32] 1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1
*[32] 1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0
*[32] 0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1
*[32] 1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1
*[32] 1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0
*[32] 0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1
*[32] 1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1
*[32] 1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0
*[32] 0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1
*[32] 1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0
*[32] 0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0
*[32] 0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1
*[32] 1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0
*[32] 0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1
*[32] 1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1
*[32] 1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0,0
*[32] 0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1,0
*[32] 0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0,1
*[32] 1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1,0
*[32] 0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0,1
*[32] 1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0,0
*[32] 0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1,0
*[32] 0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0,1
*[32] 1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1,0
*[32] 0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0,1
*[32] 1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1,0
*[32] 0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1,1
*[32] 1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0,1
*[32] 1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1,0
*[32] 0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0,1
*[32] 1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0
    Best regards,
    Igor
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  7. February 17th, 2012 02:27 AM #7
    hemanth144
    hemanth144 is offline Junior Member hemanth144 is an unknown quantity at this point (<10)
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    Re: shifting a 32bit in a array!!!!

    array contains binary number of length-32!!!! how to do shifting of those binary numbers!!!![it has to shift from left to right].
    int p[32]={1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0}
    how to do shifting of this array?
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  8. February 17th, 2012 03:09 AM #8
    Igor Vartanov's Avatar
    Igor Vartanov
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    Re: shifting a 32bit in a array!!!!

    You really think that repeating your question without any additional explanation can help?

    You go in loop from end to beginning setting p[i] = p[i-1]; finally p[0] = 0; (or any other required)
    Last edited by Igor Vartanov; February 17th, 2012 at 03:14 AM.
    Best regards,
    Igor
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  9. February 17th, 2012 03:52 AM #9
    hemanth144
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    Re: shifting a 32bit in a array!!!!

    Quote Originally Posted by Igor Vartanov View Post
    You really think that repeating your question without any additional explanation can help?

    You go in loop from end to beginning setting p[i] = p[i-1]; finally p[0] = 0; (or any other required)

    Sorry for repeating a question!!!!


    for(i=0;i<31;i++)
    {
    p[i]=p[i-1];
    cout<<p[i];
    } // if i use this code the bits be shifted from left to right?



    pl help me in this!!!!!
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  10. February 17th, 2012 04:39 AM #10
    Paul McKenzie
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    Re: shifting a 32bit in a array!!!!

    Quote Originally Posted by hemanth144 View Post
    Sorry for repeating a question!!!!


    for(i=0;i<31;i++)
    {
    p[i]=p[i-1];
    cout<<p[i];
    } // if i use this code the bits be shifted from left to right?
    Why not write the program and see if it works?

    Seriously, I can't believe the number of new posters who either refuse to debug their code and want one of us to do that job for them, or they can't just write their program and then see if it works or not.

    Regards,

    Paul McKenzie
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  11. February 17th, 2012 05:15 AM #11
    Igor Vartanov's Avatar
    Igor Vartanov
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    Re: shifting a 32bit in a array!!!!

    for(i=0;i<31;i++)
    {
    p[i]=p[i-1];
    cout<<p[i];
    } // if i use this code the bits be shifted from left to right?
    As far as I can tell, the code is going to crash immediately on the first iteration because of index being out of bounds. And even started from 1, the code just replicates the first array element (not bits!) through the rest of the array. So the answer is: No they won't.
    Best regards,
    Igor
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  12. February 17th, 2012 08:26 AM #12
    VladimirF
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    Re: shifting a 32bit in a array!!!!

    Quote Originally Posted by hemanth144 View Post
    how to do shifting of this array?
    Quote Originally Posted by hemanth144 View Post
    how to do shifting of those binary numbers!!!!
    So what are you shifting? Elements in array or their content?
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  13. February 17th, 2012 09:35 AM #13
    Lindley
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    Re: shifting a 32bit in a array!!!!

    You need to elaborate on what you expect to happen at the boundary conditions (first and last element of the array).
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  14. February 17th, 2012 09:44 AM #14
    GCDEF
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    Re: shifting a 32bit in a array!!!!

    Quote Originally Posted by hemanth144 View Post
    array contains binary number of length-32!!!! how to do shifting of those binary numbers!!!![it has to shift from left to right].
    int p[32]={1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0}
    how to do shifting of this array?
    Exclamation points don't add clarity to your post, no matter how many you use. Since nobody understood your question the first time, try rewording it.
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  15. February 17th, 2012 02:05 PM #15
    S_M_A
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    Re: shifting a 32bit in a array!!!!

    Frankly, why is it so impossible to spend a few minutes to write a question that clearly states the issue?
    Assuming that you want to shift
    int p[32]={1,0,1,1,0,1,0,1,0,0,1,0,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,1,0,1,1,0} from left to right this should do it
    Code:
    for(int i=1;i<31;i++)
{
  p[i]=p[i-1];
}
p[31] = 0;
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