使用整数通过字符串数组为每个方法调用增加

Question

在一个类中，我有一个方法在这里应该为每个调用添加int mWeight，然后每调用一次，就会移动mSize数组。在我调用getter的主要方法中，我没有在数组中获得更高的字符串值。

这里是相关的类变量和getter。

// Amount of weight to gain after eating 
    final float WEIGHT_GAIN = 0.25f; 

// Its weight in pounds 
    float mWeight; 

// Size, either "tiny", "small", "average", or "large" 
    String mSize[] = {"tiny", "small", "average", "large"}; 

int dogSize; 

String getSize(){ 
    return mSize[dogSize]; 

该方法和它需要做的事情。

/* 
* feed 
* 
* Feeds the Dog. 
* 
* Side-effect: 1. The Dog gains weight, specifically WEIGHT_GAIN 
*    2. Every 3 meals, the Dog grows to a larger size, if 
*     possible 
*     i.e. "tiny" (3 meals later ->) "small" (3 meals later ->) 
*     "average" (3 meals later ->) "large" 
*     the Dog cannot exceed the "large" size or shrink smaller than 
*     "tiny" 
* @return nothing 
*/ 

void feed(){ 
    while(mWeight < mSize.length) 
    mWeight ++; 
    mWeight = mWeight * WEIGHT_GAIN; 
    dogSize += (int)mWeight/3; 
    if (dogSize > mSize.length) 
    dogSize = mSize.length; 
} 

Answer 1

您可以保留一个变量，以表示狗的吃饭次数。

final float WEIGHT_GAIN = 0.25f; 
String mSize[] = {"tiny", "small", "average", "large"}; 
class Dog{ 
     int num_meals, mWeight, dogSize; 
     public Dog(int weight){ 
      num_meals = 0; 
      dogSize = 0; 
      mWeight = weight; 
     } 
     public String getSize(){ 
      return mSize[dogSize]; 
     } 
     void feed(){ 
      mWeight += mWeight * WEIGHT_GAIN; 
      num_meals++; 
      dogSize = num_meals/3 < mSize.length-1 ? num_meals/3 : mSize.length - 1; 
     } 
}