Qsort – C / C++ – Fórum – Programujte.com

#include <stdlib.h>

#include <string.h>

#include <stdio.h>

#include <iostream>

#include "CPole.h"

#include "CError.h"

using namespace std;



CPole::CPole(int pocet,int dolnyindex) : aPocet(pocet), aDolnyIndex(dolnyindex),

	aPole(aPocet>0 ? new double[aPocet] : NULL)

{

	printf("CPole()\n");

}



CPole::CPole(const CPole &src) : aPocet(src.aPocet), aDolnyIndex(src.aDolnyIndex),

	aPole(aPocet>0 ? new double[aPocet] : NULL)

{

	if(aPole != NULL) {

		memmove(aPole,src.aPole,aPocet*sizeof(double));

	}

}



CPole &CPole::operator = (const CPole &src)

{

	if(this != &src) {

		if(aPole!=NULL) {

			delete[] aPole;

			aPocet = 0;

			aDolnyIndex = 0;

		}

		if(src.aPole!=NULL) {

			aPocet = src.aPocet;

			aDolnyIndex = src.aDolnyIndex;

			aPole = new double[aPocet];

			memmove(aPole,src.aPole,aPocet*sizeof(double));

		}

	}

	return *this;

}



CPole::~CPole(void)

{

	printf("~CPole()\n");

	if(aPole!=NULL)

		delete[] aPole;

}



double CPole::operator[](int index)

{

	if(index<aDolnyIndex || index>aDolnyIndex+aPocet-1) throw CError("Zly index!\n",aDolnyIndex); 

	else return aPole[index-aDolnyIndex];

}



void CPole::Set(int index, double hodnota)

{

	aPole[index-aDolnyIndex] = hodnota;

}



int compare( const void *a, const void *b)

{

	int cislo1 = *((int*)a);

	int cislo2 = *((int*)b);

	if (cislo1 < cislo2) return -1;

	if (cislo1 == cislo2) return 0;

	return 1;

}



void CPole::AplikujQsort(CPole pole[], int ArraySize)

{

//	qsort(pole, ArraySize, sizeof(CPole),Compare);

}

int compare(const void *a, const void *b) 

{ 

      double cislo1 = *((double*)a); 

      double cislo2 = *((double*)b); 

      if (cislo1 < cislo2) return -1; 

      if (cislo1 == cislo2) return 0; 

      return 1; 

} 



void CPole::AplikujQsort()

{ 

	qsort(aPole, aPocet, sizeof(double), compare);

}

O nazvy atributov samozrejme neslo, ide iba o tuto chybu:

c:\documents and settings\administrator\my documents\visual studio 2008\projects\pole2\pole\cpole.cpp(70) : error C3867: 'CPole::compare': function call missing argument list; use '&CPole::compare' to create a pointer to member

To xXx : a proc tedy nepouzijes navrhovane reseni?
vyslovene ti to rika: pouzij &CPole::compare pokud chces dostat pointer na metodu tridy..
mimo to je docela rozdil mezi compare a Compare - ac se to zda ci ne, C a i vetsina jazyku od nej odvozenych jsou case sensitive (tj. na velikosti zalezi :))

Mimo to, jak mohl vedet ze slo o nejakou chybu - si k tomu nic moc nenapsal?

http://www.youtube.com/watch?v=UNsT5URhLDM&t=0m8s

To zdenda : jedna nula :D