govno

void Iteration(double Arr[5][5], double B[]) {
    double Appr[5];
    cout << "Initial approximation: ";
    for (int i = 0; i < 5; i++) {
        cin >> Appr[i];
    }
    double eps;
    cout << "Accuracy: ";   cin >> eps;
    double Kostyl = 0;
    for (int i = 0; i < 5; i++) {
        Kostyl = 0;
        for(int j = i + 1; j < 5; j++){
            Kostyl += Arr[i][j] * Appr[j];
        }
        Appr[i] = (B[i] - Kostyl)/Arr[i][i];
    }
    double Appr2[5];
    for (int i = 0; i < 5; i++) Appr2[i] = Appr[i];
    do {

        for (int i = 0; i < 5; i++) {
            Kostyl = 0;
            for (int j = i + 1; j < 5; j++) {
                Kostyl += Arr[i][j] * Appr[j];
            }
            Appr2[i] = (B[i] - Kostyl) / Arr[i][i];
        }
        if (max(Appr2, Appr) < eps) break;
        for (int i = 0; i < 5; i++) Appr[i] = Appr2[i];

    } while (1);

    for(int i = 0; i < 5; i++) printf("%7f  ", Appr2[i]);
}