diagonale_Parallela_Nulla

#include <iostream>
#include <ctime>
#include <cstdlib>

using namespace std;

/*
 * ESERCIZIO
 * Data una matrice quadrata di interi dire se esiste una diagonale parallela alla principale a somma nulla
 *
 * By Trupia Ludovico
 *
 */

#define COLONNE 7

void matrice_Intera( int matrice[][COLONNE] );
void stampa_Matrice ( int matrice[][COLONNE] );
bool diagonale_Nulla ( int matrice[][COLONNE] );

int main()
{
    srand( time ( NULL ));

    int intera[COLONNE][COLONNE] ;

    cout << endl;

    matrice_Intera( intera );
    stampa_Matrice ( intera );

    if ( diagonale_Nulla ( intera ) )
    {
        cout << endl << endl << "!!!!! ESISTE la parallela NULLA !!!!! " << endl << endl;
    }
    else
    {
        cout << endl << endl << "!!!!! NON Esiste la parallela NULLA !!!!! " << endl << endl;
    }

    return 0;
}

void matrice_Intera( int matrice[][COLONNE] )
{
    int n = 0;

    for( int i = 0; i < COLONNE; i++)
    {
        for ( int j = 0 ; j < COLONNE ; j++)
        {
            matrice[i][j] = (rand() % 15 +1);

            if( i % 2 == 0 )
            {
                matrice[i][j] = 0 - matrice[i][j];
            }
        }
    }
}

void stampa_Matrice ( int matrice[][COLONNE] )
{
    for ( int i = 0 ; i < COLONNE ; i++ )
    {
        cout << endl ;

        for ( int j = 0 ; j < COLONNE ; j++ )
        {
            cout << "\t" << matrice[i][j] ;
        }

        cout << endl;
    }
    cout << endl;
}

bool diagonale_Nulla ( int matrice[][COLONNE] )
{
    int somma = 0;

    for ( int k = 0 ; k < COLONNE ; k++ )
    {
        for ( int i = k , j = 0 ; i < COLONNE ; i++ , j++ )
        {
            cout << " i["<<i<<"] j["<<j<<"]" << " \t|| " << matrice [i][j];
            somma += matrice[i][j];
            cout << " \t|| somma -- " << somma << endl;
        }
        cout << endl << endl << endl;
        if ( somma == 0 )
        {
            return true;
        }
        somma = 0;
    }

    for ( int k = 0 ; k < COLONNE ; k++ )
    {
        for ( int i = 0 , j = k ; j < COLONNE ; i++ , j++ )
        {
            cout << " i["<<i<<"] j["<<j<<"]" << " \t|| " << matrice [i][j];
            somma += matrice[i][j];
            cout << " \t|| somma -- " << somma << endl;
        }
        cout << endl << endl << endl;

        if ( somma == 0 )
        {
            return true;
        }
        somma = 0;
    }
    return false;
}