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我正在創建一個數學程序，詢問用戶他們想使用多少位數，然後詢問他們想要做什麼樣的數學運算。然後根據用戶的答案向用戶提出10個數學問題。然後決定他們是對還是錯，並顯示適當的信息。然後計算正確答案的百分比，並根據百分比顯示一條消息。如何將一個方法的值傳遞給主方法？
問題是程序在10個問題後永不停止，從不計算百分比或顯示最終消息。我相信這至少部分是因爲我沒有從「askQuestion」方法中傳遞新的「answersTyped」值。有人可以解釋我如何輕易地將這個新值返回到主要方法，以便它能夠在10點停止？或者也許告訴我還有什麼可以使這個工作不正常？
我已經問過關於這個程序的很多問題了，所以我很感謝大家對我學習Java並且對這門語言知之甚少的耐心。
謝謝你的幫助！ （也是我的任何不良的格式在這裏道歉！改變一百萬的東西后，它得到醜陋）
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++;
}
}
與您的問題無關，您是否使用IDE？大多數IDE都內置格式化器。如果您使用Eclipse，請按'ctrl + shift + F'來格式化您的代碼。 – Mohayemin
我相信它是ctrl + I用於eclipse，而alt + shift + f用於netbeans。 （雖然也許有一個ctrl + Shift + f的日食）。 – Rogue
我通常使用Eclipse，但實際上我現在在NetBeans中。感謝提示！也感謝你繼續前進和格式化我:) – user2774647