java - 如何使这段代码不返回无限循环？

Question

我想我必须使用 String goAgainResponse 来避免无限循环，但我不知道其代码是什么样的。我应该通过添加 4 - 4/3 + 4/5 - 4/7 + 4/9 等来近似 pi。将这些项中的所有项添加到一起，就像我要求用户输入的数字一样。

      int term;
      int counter = 1;
      double piCalc=0.0;
      String goAgainResponse = null;
      boolean goAgain = false;
      Scanner kb = new Scanner(System.in);

      /* NOTE you may not declare any additional variables */

      do
      {

         System.out.println("This program will approximate Pi based on the following series:");
         System.out.println("4 - 4/3 + 4/5 - 4/7 + 4/9 - ...");

         System.out.println("Enter the term number to which you would like to approximate Pi");

         term = kb.nextInt();
         while(term <= 9)
         {
            System.out.print("Please enter a number greater than 9:");
            term = kb.nextInt();
         }

         while(term > 9)
         {
            term += 1;
            piCalc = 4/(2 * term - 1);
            System.out.print(piCalc);
         }

         System.out.print("Would you like to try again (yes/no)? ");
     }while(goAgain);

Answer 1

while(term <= 9)
     {
        System.out.print("Please enter a number greater than 9:");
        term = kb.nextInt();
     }

在这里你说 term 应该大于 9。但是你在第二个循环中的条件是 term>9 并且你在 term 中添加值，这就是为什么第二个循环是 infinte

while(term > 9)
     {
        term += 1;
        piCalc = 4/(2 * term - 1);
        System.out.print(piCalc);
     }

更改第二个循环的条件可以解决您的问题。或者再次考虑term+=1。

此外，根据 @Scary Wombat，boolean doagain 的值从未设置