Assigning an object to an element of an indexed list

earachefl · #1 24-May-2006, 23:18

I'm lost again in the whole interaction between main, a "candidate" class, and an "Indexed LIst" template class. In the indexed list, I'm trying to assign the values from an object of type candidate to an element of an array. My compiler doesn't like this and tells me:

Quote:

C11PP3 has exited due to signal 10 (SIGBUS).

I can't see that I'm doing anything illegal. Help!!
main:

CPP / C++ / C Code:

#include "candidate.h"
#include "indexList.h"

#include <iostream>
using namespace std;

int main () {
       
    indexList<candidate> slate;
    candidate newCand;
    slate.append(newCand);
        
    return 0;
}

indexList.h:

CPP / C++ / C Code:

#ifndef INDEXLIST_H
#define INDEXLIST_H

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

template<class T>
class indexList
{
    public:
        indexList()
        {
            size = 0;
        }
        bool append(const candidate& newCand)
        {
            size++;
            elements[size - 1] = newCand;
        }

    private:
        T elements[];
        int size;
};
#endif

candidate.h:

CPP / C++ / C Code:

#include <iostream>
using namespace std;

#ifndef CANDIDATE_H
#define CANDIDATE_H

class candidate
{
    public:
        //Constructor
        candidate();
                
    private:
        string name;
        int votes[5];
        int total;
 };
#endif

candidate.cpp:

CPP / C++ / C Code:


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

//Constructor
candidate::candidate()
{
    name = "";
    for (int i = 0; i < 5; i++)
        votes[i] = 0;
    total = 0;
}

MichaelS-R · #2 25-May-2006, 03:56

Hi - your problem is that there is nothing in your code to set/change the size of elements[] (to specify the number of pointers that are held within elements[]). If you want to 'grow' the array then you have to tell it so.

CPP / C++ / C Code:

bool append(const candidate& newCand)
        {
            size++;
            elements[size - 1] = newCand;
        }

    private:
        T elements[]; //NO SIZE SPECIFIED
        int size; //THIS DOES NOT HAVE ANY REAL CONNECTION TO elements[]

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Assigning an object to an element of an indexed list

Re: assigning an object to an element of an indexed list