当用户输入 "no" 时，我如何让 while 循环终止

Question

我有一个 21 点的 while 循环 Class:

while (playerSum < 21) {
  System.out.println("Would you like another card?");
  String input;
  System.out.flush();
  input = in.readLine();
  if (input.equalsIgnoreCase("yes")){
    int card3;
    Random r3 = new Random();
    card3 = r3.nextInt(11 - 2 + 1) + 2;
    switch (card3) {
      case 2: System.out.println("You were dealt a Two"); break;
      case 3: System.out.println("You were dealt a Three"); break;
      case 4: System.out.println("You were dealt a Four"); break;
      case 5: System.out.println("You were dealt a Five"); break;
      case 6: System.out.println("You were dealt a Six"); break;
      case 7: System.out.println("You were dealt a Seven"); break;
      case 8: System.out.println("You were dealt a Eight"); break;
      case 9: System.out.println("You were dealt a Nine"); break;
      case 10: System.out.println("You were dealt a Ten"); break;
      case 11: System.out.println("You were dealt a Ace"); break;
    }
    playerSum += card3;
  }
}

当用户在询问他是否想要另一张卡片时输入 "no" 时，我希望循环结束。目前，如果我输入 "yes" 以外的任何内容，它将继续询问“您想要另一张卡片吗？”。我明白为什么会这样，但我不知道如何解决。提前致谢。

Answer 1

您只需添加

即可解决此问题

break;

所以它看起来像

if (no) { break;}

希望这对您有所帮助。

Answer 2

在 if 语句的末尾添加一个 else 并跳出循环。

if (input.equalsIgnoreCase("yes")){
    int card3;
    Random r3 = new Random();
    card3 = r3.nextInt(11 - 2 + 1) + 2;
    switch (card3) {
      case 2: System.out.println("You were dealt a Two"); break;
      case 3: System.out.println("You were dealt a Three"); break;
      case 4: System.out.println("You were dealt a Four"); break;
      case 5: System.out.println("You were dealt a Five"); break;
      case 6: System.out.println("You were dealt a Six"); break;
      case 7: System.out.println("You were dealt a Seven"); break;
      case 8: System.out.println("You were dealt a Eight"); break;
      case 9: System.out.println("You were dealt a Nine"); break;
      case 10: System.out.println("You were dealt a Ten"); break;
      case 11: System.out.println("You were dealt a Ace"); break;
    }
    playerSum += card3;
  } else {
break;
}

注意： 当用户输入不同于 "yes" 的任何内容时，这将跳出循环。如果你想打破 only only，使用 else if.

当用户输入 "no" 时，我如何让 while 循环终止

How would I get a while loop to terminate when the user inputs "no"

string

terminate

while-loop

switch-statement