Question

我被困在我回到的部分：“是” - 我想继续或“不” - 我想退出。

我知道我需要显示一个if？仅在退出程序时才显示结果

    //Input your display and questions:
    int num1 = (int) (Math.random() * 10 +1); 
    int num2 = (int) (Math.random() * 10 + 1); 
    int answer = 0; 
    int correctCount=0;
    int count= 0;
    //Scanner object input
    Scanner input = new Scanner(System.in);


    //Swap numbers if number2 is bigger than number 1
    if (num1 < num2) {
        int temp = num1;
        num1 = num2;
        num2 = temp;
    }


    //OUTPUT DISPLAY QUESTION: What is num1 + num2 = ? 
    System.out.print("What is "+num1 + " * " + num2 + " = "); 
    answer = input.nextInt(); 


    //If answer is correct display: Good Job! Your got it right
    if (answer == (num1 * num2)) 
    { 
        System.out.println("Good job! You got it right!\n"); 
        correctCount++; //Increases correct count for answer correct!
    } 
    else 
        System.out.println("You got it wrong, try again!\n" +num1 + " * " +num2+ " should be " + (num1 * num2)); 

    count++;        
    System.out.print("Enter Y to continue or N to exit: \n"); //Do you want to continue             
    System.out.println("\nYou got " +correctCount+ " out of "+count + " answer correct"); //Displays Correct with total# of questions
    }
    }

Answer 1

您只需使用while循环即可使应用循环，直到用户输入y以外的字符。

另外，尝试使用try-with-resource来避免scanner对象

的源泄漏

像这样：

public static void main(String[] args) {
    // Input your display and questions:
    int answer = 0;
    int correctCount = 0;
    int count = 0;
    String continueStr = "yes";

    try (Scanner input = new Scanner(System.in)) {
        while (continueStr.equalsIgnoreCase("yes")) {
            // Scanner object input
            int num1 = (int) (Math.random() * 10 + 1);
            int num2 = (int) (Math.random() * 10 + 1);

            // Swap numbers if number2 is bigger than number 1
            if (num1 < num2) {
                int temp = num1;
                num1 = num2;
                num2 = temp;
            }

            // OUTPUT DISPLAY QUESTION: What is num1 + num2 = ?
            System.out.print("What is " + num1 + " * " + num2 + " = ");
            answer = input.nextInt();
            input.nextLine();

            // If answer is correct display: Good Job! Your got it right
            if (answer == (num1 * num2)) {
                System.out.println("Good job! You got it right!\n");
                correctCount++; // Increases correct count for answer correct!
            } else {
                System.out.println("You got it wrong, try again!\n" + num1 + " * " + num2 + " should be " + (num1 * num2));
            }
            count++;

            System.out.print("\nEnter Yes to continue or No to exit: \n"); // Do you want to continue
            continueStr = input.nextLine();
        }

        System.out.println("\nYou got " + correctCount + " out of " + count + " answer correct"); // Displays Correct with total# of questions
    }
}

编写一个循环，该循环应该生成带有单个数字随机整数的乘法问题

1 个答案: