triunghiulare

void Triunghiulare() {
    int n = INT_MIN;
    double a[100][100], b[100], S, x[100];
    cout << "Introd n.\nn = "; cin >> n;
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n; j++)
        {
            cout << "a[" << i << "][" << j << "] = ";
            cin >> a[i][j];
        }
    }
    for (int i = 1; i <= n; i++)
    {
        cout << "b[" << i << "] = ";
        cin >> b[i];
    }
    for (int i = n; i >= 1; i--)
    {
        S = 0;
        for (int j = i + 1; j <= n; j++)
        {
            S = S + a[i][j] * x[j];
        }
        x[i] = (b[i] - S) / a[i][i];
    }
    cout << endl;
    for (int i = 1; i <= n; i++)
    {
        cout << "x[" << i << "] = " << x[i] << " ";
    }
}