public class IfDemo {

public static void main(String[] args) {

Scanner scanner = new Scanner(System.in);

System.out.print("Height (m): ");    //提示输入身高

double height = scanner.nextDouble();  //赋值变量身高

System.out.print("Weight (kg): ");    //提示输入体重

double weight = scanner.nextDouble();  //赋值变量体重

double bmi = weight / (height*height);  //计算bmi指数

System.out.printf("%.2f\n",bmi);   //打印出来bmi指数

if (bmi < 18.5) {

System.out.println("过轻");

}

else if (bmi < 25) {

System.out.println("正常");

}else if (bmi <28) {

System.out.println("过重");

}else if (bmi <32) {

System.out.println("肥胖");

}else if (bmi >= 32) {

System.out.println("过于肥胖");

}

}

}