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我似乎無法得到這組代碼來返回雙CubicCent上的答案。我知道1立方厘米到釐米釐米的確切答案應該是3785.41178,但它不會返回小數點,而我的克數函數只返回一位小數。提前致謝。常量設置爲雙不會返回雙
public class Volume {
public static final double Liters_Per_Gallon = 3.785;
public static final double Cubic_Cent_Per_Liter = 1000.0;
public static final double Ounces_Per_Pound = 16.0;
public static final double Grams_Per_Ounce = 28.35;
private double pounds;
private double gallons;
double grams;
double CubicCent;
/**
* @return the gallons
*/
public double getGallons() {
return gallons;
}
/**
* @param gallons
* the gallons to set
*/
public void setGallons(double gallons) {
this.gallons = gallons;
}
/**
* @return the pounds
*/
public double getPounds() {
return pounds;
}
/**
* @param pounds
* the pounds to set
*/
public void setPounds(double pounds) {
this.pounds = pounds;
}
public double getCubicCent() {
double liters = gallons * Liters_Per_Gallon;
CubicCent = liters * Cubic_Cent_Per_Liter;
return CubicCent;
}
public double getGrams() {
double ounces = pounds * Ounces_Per_Pound;
grams = ounces * Grams_Per_Ounce;
return grams;
}
這個問題很可能在於如何打印結果 - 小數位對於double來說沒有意義,因爲它是二進制浮點類型。請剝離課程以重現問題所需的內容,並添加使您認爲自己獲得一位小數的代碼。 –