如何正确使用子方法

Question

我想在我的 CalBMI 方法中计算体重指数，这取决于 CalWt 和 CalHt 方法的输入。然后 CalBMI 方法将返回一个 BMI 答案。我该怎么做这样的操作？我的 CalBMI 中的操作

import java.util.*;   
public class PracticeMethods_returningValues {
static Scanner type=new Scanner(System.in);
public static void main(String[] args) 

{

    double Wt=0, Ht=0, BMI;

    System.out.println("Your Weight in Kg is: " + CalWt(Wt) );
    System.out.println("Your Height in meters is: " + CalHt(Ht) );
    System.out.println("Your BMI is: " + CalBMI(Wt,Ht) );


    }


    public static double CalWt(double a){
    System.out.println("Please enter your Weight in lbs: ");
    double Wt=(type.nextDouble() * .454); //Converts to Kg.
    return Wt; 

    }


    public static double CalHt(double b){
    System.out.println("\nPlease enter your Height in inches: ");
    double Ht=(type.nextDouble() * .025); //Converts to m.
    return Ht;  
    }


    public static double CalBMI(double a, double b){
    double BMI=a/(Math.pow(b, 2));
    return BMI;
    }

}

Answer 1

如果公式有误请告诉我

 public class BMI {

        public static double CalWt(Scanner type) {
            System.out.println("Please enter your Weight in lbs: ");
            return type.nextDouble() * .45359;
        }

        public static double CalHt(Scanner type) {
            System.out.println("Please enter your Height in inches: ");
            return type.nextDouble()* .025;
        }

        public static double CalBMI() {
            Scanner type = new Scanner(System.in);
            return CalWt(type) / Math.pow(CalHt(type),2);
        }

        public static void main(String[] args) {
            System.out.println(CalBMI());
        }
    }