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Wintermute2004

C++ Sort problems

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Hi all, I have this piece of code:
#include "stdafx.h"
#include <iostream.h>
#include <vector>
#include <algorithm>

using namespace std;

class meinComparator
{
public:
	bool operator() ( int x, int y)
	{
		return true;
	}
};

int main(int argc, char* argv[])
{
	vector v;
	for(int i=0;i<100;i++)
	{
		v.push_back(i);
	}
	meinComparator comp;
	std::sort(v.begin(), v.end(), comp);
	for(i=0;i<10;i++)
	{
		cout << v.at(i) << endl;
	}
	return 0;
}
 
Can someone explain to me why this crashes Inside sort ? Thx, Wintermute

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I''d guess it''s being confused by your comparator. The comparison function is assumed to obey strict weak ordering. Try changing it to something reasonable and see what happens.

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You''re right, but find this bug if your comparator is a little more complex !! I searched 6 hours, because I thought it was my failure (that comperator didn''t only return true).

Those guys at HP are really lazy.

And why ain''t there a big remark "BE CAREFUL WHILE CREATING THE COMPARATOR...." ???

ARGL, I''m really upset with that.

Wintermute

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