import java.util.Scanner;

Scanner scanner = new Scanner(System.in); // 创建Scanner对象

System.out.print("Input your weight(Kg): "); // 打印提示

double weight = scanner.nextDouble(); // 读取一行输入并获取字符串

System.out.print("Input your height(m): "); // 打印提示

double tall = scanner.nextDouble(); // 读取一行输入并获取整数

double BMI = weight / (tall*tall);

System.out.printf("Hi, your BMI is %.2f\n",BMI); // 格式化输出

if (BMI < 18.5) {

System.out.println("too light.");

}else if (BMI>=18.5 && BMI<25) {

System.out.println("normal");

}else if (BMI>=25 && BMI<28) {

System.out.println("too heavy");

}else if (BMI>=28 && BMI<32) {

System.out.println("fat");

}else {

System.out.println("too fat");

}