我的方法並沒有帶來數據（初學者）

-1

這是我的第一個CS項目。創建我的方法後，我運行代碼以查看它是否工作到目前爲止，一切正常，但實際上並沒有在方法內部進行數學運算。一直在努力工作，無法找到錯誤。任何幫助都會很棒。它的明天應該大聲笑。我的方法並沒有帶來數據（初學者）

public static void main(String[] args) { 

    int numberOfStudents = 0; 
    int total = 0; 
    int value = 0; 
    int creditHours; 
    double tuition; 
    int classesMissed; 

    System.out.println("Tuition Wasted Based on Student Absences and its effect on GPA."); 
    Scanner keyboard = new Scanner(System.in); 

    System.out.print("Enter the number of students to consider: "); 
    value = keyboard.nextInt(); 
    while (value >= 5) 
    { 
    if (value > 5) 
     System.out.println("Number of students must be between 1 and 5"); 
    System.out.print("Please re-enter a value number of students to consider: "); 
    value = keyboard.nextInt(); 
    } 

    System.out.print("Enter the student ID for student 1: "); 
    value = keyboard.nextInt(); 

    System.out.print("For how many credit hours is the student registered: "); 
    creditHours = keyboard.nextInt(); 

    System.out.print("Enter the amount of the tuition for the semester: "); 
    tuition = keyboard.nextDouble(); 

    System.out.print("Enter the average number of classes the student misses in a week: "); 
    classesMissed = keyboard.nextInt(); 
    while (classesMissed > creditHours) 
    { 
    if (classesMissed > creditHours) 
     System.out.print("That is not possible, please re-enter the number of classes missed in a week: "); 
    classesMissed = keyboard.nextInt(); 
    } 

    DetermineWastedTuition(creditHours, tuition, classesMissed); 

} 

public static void DetermineWastedTuition(int creditHours, double tuition, int classesMissed){ 

    double weeklyTuition; 
    weeklyTuition = tuition/10; 
    double weeklyTuitionWasted; 
    weeklyTuitionWasted = weeklyTuition *(classesMissed/creditHours); 
    double semesterWasted; 
    semesterWasted = weeklyTuitionWasted * 16; 

    System.out.println("Tuition money wasted each week is " + weeklyTuitionWasted); 
    System.out.println("Tuition money wasted each semester is " + semesterWasted); 

}

與樣品輸出爲：

學費浪費基於學生缺勤及其對GPA效果。
輸入學生的數量來考慮：1
輸入學生ID爲學生1：1234555
對於貸多少小時是學生註冊：15
輸入學費的金額爲學期：7500
輸入類的學生錯過了一週的平均次數：2，每星期浪費
學費的錢是0.0浪費每學期
學費的錢是0.0

來源

2014-10-02 Kesto

您是否嘗試過通過與調試代碼加強？ – rrirower 2014-10-02 18:00:27

您應該仔細研究代碼的縮進，因爲它會影響可讀性並可能隱藏或隱藏錯誤。在你的方法開始時真的不需要聲明所有的變量。 – 2014-10-02 18:04:33

以下計算：

weeklyTuitionWasted = weeklyTuition * (classesMissed/creditHours);

會返回0.0如果classesMissed < creditHours，因爲您將除以兩個int變量，因此結果將是一個int。

將其更改爲：

weeklyTuitionWasted = weeklyTuition * ((double) classesMissed/creditHours);

來源

2014-10-02 18:00:26 Eran

啊。所以你不能在Java中分割2個整數？我還沒有被教過。 – Kesto 2014-10-02 18:44:58

@Kesto當然你可以，但結果是一個整數，所以3/4會返回0,4/3會返回1，等等... – Eran 2014-10-02 18:46:31

我的方法並沒有帶來數據（初學者）

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