Как перезапускать цикл?

void NewCharacter(string &name, int &age) {
    cout << "Welcome to Mining game on C++" << endl;
    char namee;
    bool in_reg = true, namereg = true, agereg = false;
    while (in_reg) {
        while (namereg) {
            cout << "Choose name for your character: ";
            cin >> namee;
            name = namee;
            if (isupper(namee) != 1) {
                cout << "The name must start with a capital letter!" << endl;
                return;
            } else if (name.length() >= 20) {
                cout << "Character name lenght exceeds 20!" << endl;
            } else if (IsDigitCheck(name) != 0) {
                cout << "The name cannot contain numbers!" << endl;
            } else if (RussianLettersCheck(name) != 0) {
                cout << "The name cannot contain Russian letters(C++ does not allow)!" << endl;
            }
            agereg = true;
            namereg = false;
        }
        while (agereg) {
            cout << "Now choose age for your character: ";
            cin >> age;
            if (IsDigitCheck(to_string(age)) == 0) {
                cout << "The age cannot contain letters!" << endl;
            } else if (age > 35) {
                cout << "The age should not be more than 35!" << endl;
            } else if (age < 16) {
                cout << "The age must not be less than 16!" << endl;
            }
            agereg = false;
        }
        cout << "A new character has been created!" << endl;
        in_reg = false;
    }
}

char namee;
...
cout << "Choose name for your character: ";
cin >> namee;

             if (name.length() >= 20) {
                cout << "Character name lenght exceeds 20!" << endl;