Question

我的博士告诉我要弄清楚用户试图得到正确答案的次数，这让我很困惑。这是程序。请有人帮我解决这个问题。

public static void main(String[] args) {

    int a = (int) (Math.random() * 10);
    int b = (int) (Math.random() * 10);
    Scanner s = new Scanner(System.in);
    System.out.println("What is: " + a + " + " + b + " ?");
    int answer = s.nextInt();
    while (answer != (a + b)) { ///tell him it's wrong
        System.out.println("Incorrect. Try again.");
        System.out.println("What is: " + a + " + " + b + " ?");  
        answer = s.nextInt();
    } 
        System.out.println("Correct.");
        /// how many tries did the user tried? H.W
    }
}

Answer 1

只需要一个count变量，然后在循环中将其增加。

public static void main(String[] args) {

    int a = (int) (Math.random() * 10);
    int b = (int) (Math.random() * 10);
    Scanner s = new Scanner(System.in);
    int count = 0;
    System.out.println("What is: " + a + " + " + b + " ?");
    int answer = s.nextInt();
    while (answer != (a + b)) { ///tell him it's wrong
        System.out.println("Incorrect. Try again.");
        count++; //increase if the number of wrong answers
        System.out.println("What is: " + a + " + " + b + " ?");  
        answer = s.nextInt();
    } 
    System.out.println("Correct after " + count + " time(s)");
}

Answer 2

您可以将最初设置为0的变量设为count，并在每次执行while循环时将其递增，即每当用户不正确时。在循环外部，您可以将尝试次数打印为count。

在代码中你可以这样做..

import java.util.*;

class Main {
    public static void main(String[] args) {

    int a = (int) (Math.random() * 10);
    int b = (int) (Math.random() * 10);

    int count = 0; // setting variable to count number of tries
    Scanner s = new Scanner(System.in);
    System.out.println("What is: " + a + " + " + b + " ?");
    int answer = s.nextInt();

    while (answer != (a + b)) { ///tell him it's wrong
        System.out.println("Incorrect. Try again.");
        count++; // incrementing the number of tries i.e count
        System.out.println("What is: " + a + " + " + b + " ?");  
        answer = s.nextInt();
    } 

    System.out.println("Correct after " + count + " time(s)"); // displaying count
    /// how many tries did the user tried? H.W
    }

}

Answer 3

 public static void main(String[] args) {

    int a = (int) (Math.random() * 10);
    int b = (int) (Math.random() * 10);
    Scanner s = new Scanner(System.in);
    System.out.println("What is: " + a + " + " + b + " ?");
    int answer = s.nextInt();
    int count = 0;
    while (answer != (a + b)) { ///tell him it's wrong
        count++; // Why count ??
        System.out.println("Incorrect. Try again."); 
        System.out.println("What is: " + a + " + " + b + " ?");  
        answer = s.nextInt();
    } 
        System.out.println("Correct. It took you " + count + "attempt/s.");
        /// how many tries did the user tried? H.W

    }
}

我看到你对上述答案的评论。答案是100％正确。

现在回答您关于使用count。

的问题

告诉我你将如何手动完成。如果你向你的朋友提问，他/他尝试了4次，然后在最后一次尝试得到了正确答案，即第5次尝试，那么你将如何告诉他/她＆＃34;哦你做了5次尝试......！＆＃ 34; ??

每次他/她回答时，你都会在你的指尖上计算它（直到正确的猜测），对吗？

正是你通过代码执行的操作，启动/初始化变量为zero（0），当你从用户那里得到输入（即回答）时，检查它是否正确...如果这是正确的你会把计数值增加1（打开你的第一根手指然后说'＃34;嘿你曾经尝试过一次＆＃34;），如果它是错的你会（打开你的手指然后说'＃34;不，再试一次。＆＃34;）将计数器增加1，并在每次错误的尝试时一次又一次地增加计数器。如果答案匹配，你会增加计数器并说'＃34; Hurray ..你得到了正确答案并且花了count次。＆＃34;

希望你的问题得到解决。 !!

得到尝试循环的时间

3 个答案: