java - 需要帮助将公斤转换为磅和盎司

Question

由于某种原因，这种转换真的让我很困惑。我可以在纸上和脑子里进行转换，但是当我尝试用 Java 编写作业时，这真的让我很困惑。任务是让用户输入一个以千克为单位的数字，并编写一个程序，该程序表示一条线上有多少磅，另一线上有多少盎司。一般来说，转换让我很困惑，但我不确定这是否正确。我需要在任何地方使用类型转换吗？

import acm.program.*;

public class KilogramsToPoundsAndOunces extends ConsoleProgram {

public void run(){
println("This programs converts kilograms into pounds and ounces.");
double kilo = readDouble("Enter the kilogram value: "); 
double totalOunces = (kilo * POUNDS_PER_KILOGRAM) * OUNCES_PER_POUND; 
int totalPounds = totalOunces % OUNCES_PER_POUND; 
double leftOverOunces = totalOunces - (totalPounds * OUNCES_PER_POUND);  
println(totalPounds + "lbs" + ".");
println(leftOverOunces + "ozs" + ".")

}
private static void POUNDS_PER_KILOGRAM = 2.2; 
private static void OUNCES_PER_POUND = 16; 
}   

Answer 1

您需要为常量定义数字数据类型:

private static double POUNDS_PER_KILOGRAM = 2.2; 
private static int OUNCES_PER_POUND = 16; 

此外，totalPounds 需要转换为 int 进行编译:

int totalPounds = (int) (totalOunces % OUNCES_PER_POUND);

虽然这应该是:

int totalPounds = (int) (totalOunces / OUNCES_PER_POUND);

(参见@Kleanthis 答案)