Broj izolovanih oblasti

#include <iostream>
#include <cstdlib>

using namespace std;

int m, n, povrsinaOblasti;
int a[100][100];
void izolovanaOblast(int y, int x)
{
    a[y][x] = 1;
    povrsinaOblasti++;

    if((y>0) && (a[y-1][x] == 0))
        izolovanaOblast(y-1, x);

    if((x>0) && (a[y][x-1] == 0))
        izolovanaOblast(y, x-1);

    if((x<n-1) && (a[y][x+1] == 0))
        izolovanaOblast(y, x+1);

    if((y<m-1) && (a[y+1][x] == 0))
        izolovanaOblast(y+1, x);
}


int main()
{
    cin >> m >> n;
    for (int i=0; i<m; i++)
        for (int j=0; j<n; j++)
            cin >> a[i][j];

    int brIzolovanihOblasti = 0;

    for (int i=0; i<m; i++)
        for (int j=0; j<n; j++)
            if(a[i][j] == 0)
            {
                brIzolovanihOblasti++;
                povrsinaOblasti = 0;
                izolovanaOblast(i,j);
                cout << i << ", " << j << "  povrsina: " << povrsinaOblasti << endl;
            }
    cout << brIzolovanihOblasti << endl;

    system("pause");
    return 0;
}