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我正在创建一个数学程序，询问用户他们想使用多少位数，然后询问他们想要做什么样的数学运算。然后根据用户的答案向用户提出10个数学问题。然后决定他们是对还是错，并显示适当的信息。然后计算正确答案的百分比，并根据百分比显示一条消息。如何将一个方法的值传递给主方法？
问题是程序在10个问题后永不停止，从不计算百分比或显示最终消息。我相信这至少部分是因为我没有从“askQuestion”方法中传递新的“answersTyped”值。有人可以解释我如何轻易地将这个新值返回到主要方法，以便它能够在10点停止？或者也许告诉我还有什么可以使这个工作不正常？
我已经问过关于这个程序的很多问题了，所以我很感谢大家对我学习Java并且对这门语言知之甚少的耐心。
谢谢你的帮助！ （也是我的任何不良的格式在这里道歉！改变一百万的东西后，它得到丑陋）
import java.util.Scanner;
import javax.swing.JOptionPane;
public class Assignment2 {
public static int answeredTyped = 0;
public static int correctAnswers = 0;
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int difficulty = 1;
String[] operators = { "plus", "minus", "times", "divided by" };
int selectedOperator = 1;
int difficultyInput = Integer
.parseInt(JOptionPane
.showInputDialog("Please choose the difficulty. Enter the number of digits to use in each problem."));
if (difficultyInput > 0) {
difficulty = difficultyInput;
}
int arithmeticMethod = Integer
.parseInt(JOptionPane
.showInputDialog("Choose an arithmetic problem to study: 1 = Addition Only, 2 = Subtraction Only, 3 = Multiplication Only, 4 = Division Only, 5 = Random Problems"));
selectedOperator = arithmeticMethod;
new Assignment2().askQuestion(difficulty, null, selectedOperator,
answeredTyped, operators, correctAnswers);
while (answeredTyped < 10) {
askQuestion(difficulty, null, selectedOperator, answeredTyped,
operators, correctAnswers);
answeredTyped++;
if (answeredTyped>= 10) {
if (((float) correctAnswers/answeredTyped) >= 0.75) {
JOptionPane
.showMessageDialog(null,
"Congratulations, you are ready to go on to the next level!");
} else {
JOptionPane.showMessageDialog(null,
"Please ask your teacher for extra help.");
}
}
}
}
public static boolean checkResponse(double primaryInt, double secondaryInt,
String operatorText, double response) {
if (operatorText.equals("plus")) {
return (primaryInt + secondaryInt) == response;
} else if (operatorText.equals("minus")) {
return (primaryInt - secondaryInt) == response;
} else if (operatorText.equals("times")) {
return (primaryInt * secondaryInt) == response;
} else if (operatorText.equals("divided by")) {
return (primaryInt/secondaryInt) == response;
}
return false;
}
public static String displayResponse(boolean isCorrect) {
int randomIndex = (int) (Math.floor(Math.random() * (4 - 1 + 1)) + 1);
switch (randomIndex) {
case 1:
return isCorrect ? "Very Good!" : "No. Please try again.";
case 2:
return isCorrect ? "Excellent!" : "Wrong. Try once more.";
case 3:
return isCorrect ? "Nice Work!" : "Don\'t give up!";
case 4:
return isCorrect ? "Keep up the good work!" : "No. Keep trying.";
}
return "Oops...";
}
public static void askQuestion(int difficulty, String operatorText,
int selectedOperator, int answeredTyped, String[] operators,
int correctAnswers) {
boolean correctAnswer = false;
double primaryInt = Math.floor(Math.pow(10, difficulty - 1)
+ Math.random() * 9 * Math.pow(10, difficulty - 1));
double secondaryInt = Math.floor(Math.pow(10, difficulty - 1)
+ Math.random() * 9 * Math.pow(10, difficulty - 1));
operatorText = (selectedOperator == 5) ? operators[(int) Math
.floor(Math.random() * operators.length)]
: operators[selectedOperator - 1];
double response = Double.parseDouble(JOptionPane
.showInputDialog("How much is " + primaryInt + " "
+ operatorText + " " + secondaryInt + "?"));
correctAnswer = checkResponse(primaryInt, secondaryInt,
operatorText, response);
JOptionPane.showMessageDialog(null, displayResponse(correctAnswer));
if (correctAnswer)
correctAnswers++;
}
}
与您的问题无关，您是否使用IDE？大多数IDE都内置格式化器。如果您使用Eclipse，请按'ctrl + shift + F'来格式化您的代码。 – Mohayemin
我相信它是ctrl + I用于eclipse，而alt + shift + f用于netbeans。 （虽然也许有一个ctrl + Shift + f的日食）。 – Rogue
我通常使用Eclipse，但实际上我现在在NetBeans中。感谢提示！也感谢你继续前进和格式化我:) – user2774647