Не возвращается в меню

void uravnenie(){
        system("color 03");
                cout << "\tEnter the equation border:\n";
    //int a, b, c;
    //float e;
    cout << "a = ";
    cin >> a;
    cout << "b = ";
    cin >> b;
    cout << "Enter computational accuracy\ne = ";
    cin >> e;
    int reshenie1 = bisekciya(a,b,e);
    int reshenie2 = horde(a,b,e);
    cout << "-----------------------------------------------------------------------------\n";
    cout << "The root of the equation at the bisection method x  = " << reshenie1;
    cout << "\n-----------------------------------------------------------------------------\n";
    cout << "-----------------------------------------------------------------------------\n";
    cout << "The root of the equation at the horde method x  = " << reshenie2;
    cout << "\n-----------------------------------------------------------------------------\n";
 
    cout << "Enter 1 to return to the menu.\n";
 
    cin >> vit;
    if (vit == 1)
        menu();
    else
    cout << "\n\n\n\n\n\t\tWrong number. But the program will still working.";
    Sleep(3000);
    menu();
    }

cin >> vit;
    if (vit == 1)
        menu();
    else
    cout << "\n\n\n\n\n\t\tWrong number. But the program will still working.";
    Sleep(3000);
    menu();