No matching function? [C++ Error]

[GianluTB]

hello all,

could someone tell me why this code does not work?

The link: Pastebin

The error is:
17|error: no matching function for call to 'AddizionaFrazioni(int (*)[2][2], int)'|

Thanks!

[jimblumberg]

Does the AddizonaFrazion() function exist? If so does this function have the same number and type of arguments? Check the spelling and remember that C++ is case sensitive. Otherwise post your code between code tags.

Jim

[GianluTB]

Yes, the function exists..
This is the code:

#include <iostream>

using namespace std;

template <class type> type mcm(type*,type);
template <class type> type MinInArr(type*,type);
// template <class type> type MaxInArr(type*,type);
template <class type> type* AddizionaFrazioni(type**,type);

int main()
{
    cout << "Start.." << endl;

    int frazioni[2][2] = { {1,4}, {2,4} };
    int *risultato;

    risultato = AddizionaFrazioni(&frazioni,2);

    cout << risultato[0] << "%" << risultato[1] << endl;

    return 0;
}
template <class type> type* AddizionaFrazioni(type** frazioni, type nfrazioni)
{
    type denominatore = 0;
    type *denominatori = new type[nfrazioni];
    type numeratore = 0;

    for(type i = 0; i < nfrazioni; i++)
    {
        denominatori[i] = frazioni[i][0];
    }

    denominatore = mcm(denominatori,nfrazioni);

    delete [] denominatori;

    for(int i = 0; i < nfrazioni; i++)
    {
        numeratore += denominatore/frazioni[i][1]*frazioni[i][0];
    }

    type risultato = new type[2];
    risultato[0] = numeratore;
    risultato[1] = denominatore;

    return risultato;
}

template <class type> type mcm(type *numeri, type len)
{
    type mcm = MinInArr(numeri,len);
    type i = 0, err = 0;
    while(1)
    {
        err = 0;
        for(i = 0; i < len; ++i)
        {
            if( (mcm % numeri[i]) != 0 )
            {
                ++err;
                break;
            }
        }
        if (err == 0)
        {
            return mcm;
        }
        ++mcm;
    }
}

template <class type> type MinInArr(type *numeri, type len)
{
    type min = NULL;
    for(type i = 0; i < len; ++i)
    {
        if( (min == NULL) || (min > numeri[i]) )
        {
            min = numeri[i];
        }
    }
    return min;
}

/*
template <class type> type MaxInArr(type *numeri, type len)
{
    type max = NULL;
    for(type i = 0; i < len; ++i)
    {
        if( (max == NULL) || (max < numeri[i]) )
        {
            max = numeri[i];
        }
    }
    return max;
}
*/

[jimblumberg]

Okay the function exists but you are not calling it with the proper parameters. Your variable frazioni[2][2] only has two dimensions, in the function call you are trying to send a int (*)[2][2] (three dimensions). Remember the address of an array is the array name, you don't want to use the ampersand when calling this function.

Jim

[GianluTB]

Okay the function exists but you are not calling it with the proper parameters. Your variable frazioni[2][2] only has two dimensions, in the function call you are trying to send a int (*)[2][2] (three dimensions). Remember the address of an array is the array name, you don't want to use the ampersand when calling this function.

Jim

Thank you very much!

Now it works!

[Elysia]

I would rather see you use std::vector or std::array.