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theimmortalbg 23Jan2011 18:39

Pointer to function
 
hello this is my program

Code:

#include "stdafx.h"
#include <iostream>
using namespace std;

bool isOdd(const int* item)
{
return (*item)%2;
}

int deleteItems (int *array, int itemSize, int itemsCount, bool (*shouldDeleteItem)(const int*))
{
for(int i=0; i<itemsCount; i++)
cout<< shouldDeleteItem (array+i)<< endl;       

return itemsCount*itemSize;
}

void main()
{
int *p = NULL;
int n;
cout<< "Enter length of array: ";
cin>> n;
p = new int [n];

cout<< "Numbers in the array: ";
for(int i=0; i<n; i++)
cin>> *(p+i);

for(int i=0; i<n; i++)
{
deleteItems(p, sizeof(p+i), n, isOdd(p+i));
}       
}

I am trying to call the function deleteItems(int *array, int itemSize, int itemsCount, bool (*shouldDeleteItem)(const int*)) but i can't. Compiler says cannot convert parameter 4 from bool to bool(_cdecl*)(const int *). How i can call delleteItems with last parameter isOdd(p+i). Thanks

jimblumberg 24Jan2011 00:25

Re: Pointer to function
 
You should just be passing the function pointer like:
Code:

deleteItems(p, sizeof(p+i), n, isOdd)


Jim


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