如果switch语句达到默认值,则重复执行while循环

Question

我有一个while循环请求用户输入.在while while循环中我有一个switch语句.如何才能使其达到默认值,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

一种选择是设置一个布尔值,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);

你可以适当地使用重复来知道你想重复哪个问题.