BMI计算器问题

Question

在没有让BMR计算器按预期工作之后，我决定用一些简单一点的方法来做BMI的计算器(因为它不需要性别的不同方法)，它或多或少会被BMR计算器重写。问题是，我对我应该如何使用这个数学不太自信，因为我认为我可以舍弃答案，让它作为浮动返回，但是当我使用测试类时，它告诉我，person 1的BMI是0。在将calc方法保持为浮点数的同时，有什么方法可以修复这个问题吗？

BMI类

​

public class BMI {

  private String name;
  private float weight; //Meters
  private float height; //Kilograms

  public BMI(String n, float w, float h) //CONSTRUCTOR 
    {
      n = name;
      w = weight;
      h = height;
    }

  public float calculateBMI() //MATH CALCULATIONS
    {
      return Math.round((weight * 2.20462) / (height * 39.3701)); //The numbers mulitplied by height & weight are the conversions
    }

  public String catagoryBMI() {
    String getcata;

    if (calculateBMI() <= 15) {
      getcata = "Very severely underweight";
    } else if (calculateBMI() < 16.0) {
      getcata = "Severely underweight";
    } else if (calculateBMI() < 18.0) {
      getcata = "Underweight";
    } else if (calculateBMI() < 25) {
      getcata = "Normal (healthy weight)";
    } else if (calculateBMI() < 30) {
      getcata = "Overweight";
    } else if (calculateBMI() < 35) {
      getcata = "Obese Class I (Moderately obese)";
    } else if (calculateBMI() < 40) {
      getcata = "Obese Class II (Severely obese)";
    } else {
      getcata = "Obese Class III (Very severely obese)";
    }

    return getcata;
  }
}

​

体质指数测试类别

​

public class BMITest {
  public static void main(String[] args) {
    BMI bmi1 = new BMI("BMI TEST1", 65.7709f, 1.79832f);
    //p1BMI = bmi1.calculateBMI();
    //p1CATA = bmi1.catagoryBMI();

    System.out.println("BMI PERSON 1: " + bmi1.calculateBMI());
    System.out.println("CATAGORY PERSON 1: " + bmi1.catagoryBMI());

  }
}

​

Answer 1

你是在分配给参数，而不是字段。这

public BMI(String n, float w, float h) //CONSTRUCTOR 
{
  n = name;
  w = weight;
  h = height;
}

应该是这样的

public BMI(String n, float w, float h) //CONSTRUCTOR 
{
  name = n;
  weight = w;
  height = h;
}