3.15

#include <iostream>

using namespace std;

class arr
{
    private:
    int* a;
    int len;
    public:
    arr(int Len) { a = new int[Len], len = Len; }
    arr(int Len, int x)
    {
        a = new int[Len], len = Len;
        for (int i = 0; i < Len; i++) a[i] = x;
    }
    ~arr() { delete[] a; cout << "Array was deleted.\n"; }
    void input() { for (int i = 0; i < len; i++) cin >> a[i]; }
    void output() { for (int i = 0; i < len; i++) cout << a[i] << " "; cout << endl; }
    void e_o(int* e, int* o)
    {
        int l, r;
        *e = 0; *o = 0;
        do {
            cin >> r >> l;
            if (l % 2 != 0 || r % 2 != 0) cout << "Indexes must be positive and not go beyond the array. Try again.\n";
        } while (l % 2 != 0 || r % 2 != 0 || r >= len || l >= len || r < 0 || l<0);
        if (l > r) swap(l, r);
        for (int i = l; i <= r; i++)
            if (a[i] % 2) *o += 1;
            else *e += 1;
    }


};

int main(){
    int even, odd;
    arr A(7), B(5, 3);
    B.output();
    A.input();
    A.e_o(&even, &odd);
    cout << odd << " odd numbers and " << even << " even numbers are located between these indexes in the array.\n";
    return 0;
}