c++ - 如果 switch 语句达到默认值，则重复 do while 循环

Question

我有一个 do while 循环请求用户输入。在这个 do while 循环中，我有一个 switch 语句。我怎样才能做到这一点，以便在满足默认值的情况下重复循环再次询问用户性别？

do
    {
        cout << "What is your weight?" << endl;
        cin >> weight;
        cout << "What is your height?" << endl;
        cin >> height;
        cout << "What is your age?" << endl;
        cin >> age;
        cout << "What is your gender?" << endl;
        cin >> gender;

        switch (gender)
        {
            case 'M':
            case 'm':
                cout << endl << Male(weight, height, age);
                break;
            case 'F':
            case 'f':
                cout << endl << Female(weight, height, age);
                break;
            default:
                cout << "What is your gender?";
        }

        cout << "Do you want to continue? (Y/N)" << endl;
        cin >> stopApp;

    } while(toupper(stopApp) == 'Y');

Answer 1

一个选项是设置一个 bool 值，如果达到默认情况，则将其设置为 true 以重复。

bool repeat;
do {
  repeat = false;
  //switch statement
  switch {
    default:
      repeat = true;
  }
while(repeat);

您可以适本地使用 repeat 来知道您还想重复哪个问题。