java - while 循环帮助

Question

我有一个类项目，我必须要求用户输入体重指数和体表面积计算器。我有一个 if else 语句，需要放入 while 循环中。我需要让它通过，如果用户输入“w”则显示体重变量，“h”则显示高度。此外，如果用户输入“q”来退出程序。我需要有关如何创建 while 循环的帮助。

import java.util.*;
public class Assignment2 {


public static void main(String[] args) {

    //Scanner
    Scanner stdIn = new Scanner(System.in);


    //Variables
    final double METERS_TO_CM = 100;   // The constant to convert meters to centimeters
    final double BSA_CONSTANT = 3600;  // The constant to divide by for bsa
    double bmi;                        // Body Mass Index
    double weight;                     // Weight in kilograms
    double height;                     // Height in meters
    String classification;             // Classifies the user into BMI categories 
    double bsa;                        // Body surface area
    char quit = stdIn.nextLine().charAt(0);

    System.out.print("Welcome to the BMI and BSA Calculator to begin enter weight in kilograms.");
    weight = stdIn.nextDouble();
    System.out.print("Enter height in meters: ");
    height = stdIn.nextDouble();


    bmi = weight/(height*height);

    while (quit != 'q');
    {
        if (bmi < 18.5)
        {
            classification = "Underweight";
        }
        else if (bmi < 25)
        {
            classification = "Normal";
        }
        else if (bmi < 30)
        {
            classification = "Overweight";
        }
        else
        {
            classification = "Obese";
        }

        System.out.println("Your classification is: " + classification);

        bsa = Math.sqrt(((height*METERS_TO_CM)*weight)/BSA_CONSTANT);
        System.out.printf("BMI: %.1f\n", bmi);
        System.out.printf("BSA: %.2f\n", bsa);
    }
}
}

Answer 1

这是基本逻辑。

   String inp = ask the user for input;
   while(!inp.equalsIgnoreCase("q")){
       if(inp is w){

       }else{
          if(inp is h){

          }
       }
       inp = ask user for another input;
   }