Java - 數學與整數

Question

我很新的編程和我目前教自己的Java。我試圖製作一個涉及BMI的程序，但我繼續顯示0而不是BMI值。

我敢肯定我的錯誤是在數學，但我不知道是什麼改變：

public class bmi { 
    public static void main(String[] args) { 
     Scanner k = new Scanner(System.in); 

     System.out.print("Weight(kg):"); 
     int weight=k.nextInt(); 

     //now for the second scanner or int 
     Scanner j = new Scanner(System.in); 
     System.out.print("Height (m):"); 

     int height=j.nextInt(); 
     double bodyMassIndex = ((double) weight/(height * height)); 

     //so far this looks fine i believe , however there might be a problem with the math. 
     System.out.println(bodyMassIndex); 
    } 
} 

Answer 1

更改爲double bodyMassIndex = (703 * ((double) weight/(height * height)));

編輯：

public class bmi 
{ 
    public static void main(String[] args) 
    { 
     Scanner input = new Scanner(System.in); // Only need one scanner for multiple variables 

     System.out.print("Weight(kg):"); 
     double weight = input.nextDouble(); 

     System.out.print("Height (m):"); 
     double height = input.nextDouble(); 

     double bodyMassIndex = (weight/(height * height)); 

     System.out.println(bodyMassIndex); 
    } 
}