如何解決這個問題？ java的功課

Question

我有功課

這是我的問題

和我的代碼是

public class DisplayTime { 

    public static void main(String[] args) {   
     int seconds = 290; 
     int hour = seconds/60/60; 
     int minute = seconds/60; 

     seconds = seconds%60;  

     System.out.printf("The amount of [ 290 ] seconds are %02d:%02d:%02d\n",hour,minute,seconds); 

     seconds = 7650; 
     hour = seconds/60/60; 
     minute = seconds/60; 

     seconds = seconds%60; 

     System.out.printf("The amount of [ 7650 ] seconds are %02d:%02d:%02d\n",hour,minute,seconds); 
    } 
} 

我在7650輸出不一樣，爲什麼？ :(

和我的解決方案是真的嗎？

Answer 1

那是因爲你沒有減去分鐘的時間，所以時間被重複計算，即，使用minute = seconds/60 - hour * 60;代替minute = seconds/60;你會得到正確的結果。

實際上是第一部分（The amount of [ 290 ] seconds are 00:04:50）你也應該修改代碼。它看起來不錯的原因是因爲290秒是不到一個小時，所以沒有出現問題。

這裏充滿代碼：

public class DisplayTime { 

    public static void main(String[] args) { 

     int seconds = 290; 
     int hour = seconds/60/60; 
     int minute = seconds/60 - hour * 60;; 

     seconds = seconds % 60; 

     System.out.printf("The amount of [ 290 ] seconds are %02d:%02d:%02d\n", hour, minute, seconds); 

     seconds = 7650; 
     hour = seconds/60/60; 
     minute = seconds/60 - hour * 60; 

     seconds = seconds % 60; 

     System.out.printf("The amount of [ 7650 ] seconds are %02d:%02d:%02d\n", hour, minute, seconds); 
    } 
} 

下面是結果：

The amount of [ 290 ] seconds are 00:04:50 
The amount of [ 7650 ] seconds are 02:07:30 

Answer 2

由於@Balwinder在他的評論中提到的，那你最好有它接受秒，打印出格式化顯示時間一個輔助方法。下面的代碼只需幾行即可完成。

public static void printHMS(int secs) { 
    int seconds = secs % 60; 
    int minutes = (secs/60) % 60; 
    int hours = (secs/60)/60; 

    System.out.printf("The amount of [ %d ] seconds are %02d:%02d:%02d\n", secs, hours, minutes, seconds); 
} 

public static void main(String args[]) { 
    printHMS(290); 
    printHMS(7650); 
} 

輸出：

The amount of [ 290 ] seconds are 00:04:50 
The amount of [ 7650 ] seconds are 02:07:30 

Answer 3

做它像一個親：

/*** Returns the Time**/ 
public static String getTimeEdited(int seconds) { 

    if (seconds/60 > 60) // Is more than one hour>60 
     return String.format("%02d:%02d:%02d",(seconds/60)/60,(seconds/60)%60,seconds%60); 
    else     // Is less than one hour<60 
     return String.format("%02d:%02d",(seconds/60)%60,seconds%60); 


}