通過以給定百分比增加來傳遞和更新分數陣列

Question

public class ScoreCard { 

private double[] scores; 
/** 
* 
* @param val 
* @param low 
* @param high 
* @return low if val < low, 
* high if val > high, 
* val if val is between low and high 
*/ 
private double constrain(double val, int low, int high) { 
    if (val < low) 
     return low; 
    if (val > high) 
     return high; 
    return val; 
    } 

. 
. 
. 
. 

/** 
* update each score so it increases by given percentage. For example, 
* if score = {60.0, 90.0} before the method is called, it should 
* become {72.0, 100.0} after the method is called with parameter 20. 
* Note: 90.0 increased by 20% is 108, but scores should be constrained between 
* 0 and 100. So, 100. 
* @param percentage 
*/ 

public void scale(double percentage) { 
    for (int i = 0; i < scores.length; i++) { 
     percentage = scores[i]/100.0 * percentage; 
     scores[i] += constrain(percentage, 0, 100); 
     } 
    } 

我一直被困在一個項目的一小段代碼上。當我嘗試並傳遞此函數時，我失敗了JUnit測試。它似乎正確地更新數組與給定的百分比（10％），而不是每個項目更新由給定的百分比，它似乎劃分數組內的項目之間的百分比，給我醜陋的數字。

任何援助將大大appreicated！

Answer 1

你爲什麼要改變循環中的百分比值？ 我會做一些像這樣：

for (int i = 0; i < scores.length; i++) { 
    scores[i] = constrain(scores[i]*(1+percentage/100), 0, 100); 
} 

Answer 2

public void scale(double percentage) { 
    for (int i = 0; i < scores.length; i++) { 
     percentage = scores[i]/100.0 * percentage; 

     scores[i] =(scores[i]+percentage)>=100?100:(scores[i]+percentage); 
     } 

    }