lab1.4 c++

#include <iostream>

using namespace std;

int main()
{
    int dlina, dlina2, polDliny, i, peremen;
    bool isIncorrect;
    cout << "The program reverses the array.\n";
    cout << "Enter array length: ";
    do
    {
        isIncorrect = false;
        cin >> dlina;
        if (cin.fail())
        {
            cin.clear();
            while (cin.get() != '\n');
            isIncorrect = true;
            cerr << "Incorrect value. Enter the number: ";
        }
        if (!isIncorrect && cin.get() != '\n')
        {
            cin.clear();
            while (cin.get() != '\n');
            cerr << "Incorrect value. Enter the number: ";
            isIncorrect = true;
        }
        if (!isIncorrect && dlina < 2) {
            cerr << "Incorrect value (size must be > 1): ";
            isIncorrect = true;
        }
    } while (isIncorrect);

    int* massiv = new int[dlina];
    cout << "Enter array members: ";
    dlina2 = dlina - 1;
    for (i = 0; i < dlina; i++) {
        do {
            isIncorrect = false;
            cin >> massiv[i];
            if ((cin.fail()))
            {
                cin.clear();
                while (cin.get() != '\n');
                isIncorrect = true;
                cout << "Incorrect value. Enter the number: ";
            }
            if (!isIncorrect && cin.get() != '\n')
            {
                cin.clear();
                while (cin.get() != '\n');
                cerr << "Incorrect value. Enter the number: " << endl;
                isIncorrect = true;
            }
        } while (isIncorrect);
    }
    polDliny = dlina / 2;
    for (i = 0; i < polDliny; i++) {
        peremen = massiv[i];
        massiv[i] = massiv[dlina - i - 1];
        massiv[dlina - i - 1] = peremen;
    }
    for (i = 0; i < dlina; i++) {
        cout << massiv[i] << " ";
    }
    return 0;
}