Converting Array to Vector for Sorting : Microsoft, C++, Error C2664: 'Insertion' : cannot convert parameter 1 from 'std::vector<_Ty> (*__w64 )[100]' to 'std::vector<

May 16, 2008 09:04pm pdt

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03.02.2008 at 07:39PM PST, ID: 23208417

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8.7

Converting Array to Vector for Sorting

Zones: Microsoft Visual C++.Net, C++ Programming Language, Visual Studio .NET 2005

Tags: Microsoft, C++, Error C2664: 'Insertion' : cannot convert parameter 1 from 'std::vector<_Ty> (*__w64 )[100]' to 'std::vector<_Ty> &'

I have been working on these particular sorts for a few days and I have been trying to debug four errors 3 of which are the same. I have been googled these errors and cannot figure out where I am going wrong in my code. If anyone can help me out I would appreciate it greatly.

I am posting the four errors that I am getting and also I am posting the code for anyone's review. I really need to figure this out as quickly as possible. I am attaching my code in a text file. I am using Visual Studio 2005

Thank you in advance.

error C2664: 'Insertion' : cannot convert parameter 1 from 'std::vector<_Ty> (*__w64 )[100]' to 'std::vector<_Ty> &'

error C2664: 'Sink' : cannot convert parameter 1 from 'std::vector<_Ty> (*__w64 )[100]' to 'std::vector<_Ty> &'

error C2664: 'AloneSelection' : cannot convert parameter 1 from 'std::vector<_Ty> (*__w64 )[100]' to 'std::vector<_Ty> &'

error C2665: 'QuickSort' : none of the 2 overloads could convert all the argument types

Attachments:

Sorting.txt (5 KB) (File Type Details)

Sorting Functions

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Question Stats

Zone: Microsoft

Question Asked By: volunteer2

Solution Provided By: josgood

Participating Experts: 2

Solution Grade: A

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03.02.2008 at 08:07PM PST, ID: 21028967

Rank: Master

josgood:

It seems to me that your first problem is the square brackets usage
vector<int> vArrayInsertion[nArray_Numbers];
instead of parenetheses
vector<int> vArrayInsertion(nArray_Numbers);
which creates a vector initialized to contain room for nArray_Numbers elements.

Are you deliberately creating an array of vectors?

03.02.2008 at 08:19PM PST, ID: 21028987

Rank: Master

josgood:

std::copy is defined to take iterators as its arguments, as shown in this page
http://www.cppreference.com/cppalgorithm/copy.html

So,
copy(vArrayInsertion.begin(), vArrayInsertion.end(), vArraySink.begin());
would copy vArrayInsertion to vArraySink

Am I tracking with what you are trying to do?

Accepted Solution

03.03.2008 at 12:01AM PST, ID: 21029653

Rank: Wizard

evilrix:

You don't need to convert an array to a vector to sort it, you can pass pointers to the first item and 1 past the last item and the array will get sorted. You can initialize a vector using an array, again, using a pointer to the start of the array and 1 beyond the end. The code below should give you an idea of doing this.

                       
                          
                             
                             
                                #include <algorithm>
#include <vector>
#include <iostream>
 
int main()
{
	int an[] = {6,8,2,4,7,9,0 };
	size_t an_len = (sizeof(an)/sizeof(an[0]));
 
	// You can initialize a vector with an iterator range (pointers will be treated like iterators)
	std::vector<int> vn(an, an+an_len);
 
	// Sort the array
	std::sort(an, an+an_len);
 
	// Sort the vector
	std::sort(vn.begin(), vn.end());
 
	// Display sorted array
	std::cout << "Array: -" << std::endl;
	for(size_t n = 0 ; n < an_len ; ++n)
	{
		std::cout << an[n] << std::endl;
	}
 
	// Display sorted vector
	std::cout << "Vector: -" << std::endl;
	for(std::vector<int>::iterator itr = vn.begin() ; itr != vn.end() ; ++itr)
	{
		std::cout << *itr << std::endl;
	}
 
	return 0;
}
                             
                          

                    

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Assisted Solution

03.03.2008 at 12:13AM PST, ID: 21029706

Rank: Wizard

evilrix:

I have a quick look at your code and, to be honest, it has more than a few problems. You seem to be declaring some global arrays of vectors but, as josgood has pointer out, I am not convinced this is what you mean to do because your code tries to use these as normal vectors. You should note, also, that declaring STL contains global is dangerous since they can throw on construction, which will cause your code to crash before main() is even executed.

I'm not quite sure why you have all these auxiliary functions, they add a level of indirection that only serves to confused. I did start going through your code to try and resolve your build issues but the more I tried to fix the more confusing the code became so I aborted!

The reason for your initial errors, incidentally, is because you are trying to pass am array of vectors as a reference to a vector to your various auxiliary functions.

Also, why are you re-inventing the wheel with, for example, your own swap function? Functions like this already exist.

http://www.sgi.com/tech/stl/swap.html

I hope this info helps.

Good luck.

20080236-EE-VQP-29 / EE_QW_2_20070628