【JAVA练习题01】【控制流程】JAVA的IF 条件语句-BMI&闰年,Java语言交流,技术交流,鱼C论坛

xiaoliu66 发表于 2021-5-8 10:38:00

写完了

Njmao 发表于 2021-6-6 13:03:34

感谢分享

liujian973 发表于 2021-6-29 10:25:58

package code_test;
import javax.management.MBeanAttributeInfo;
import javax.swing.text.Style;
import java.util.Scanner;

public class if语句 {
public static void main(String[] args) {
//    System.out.println("请输入体重");
//    Scanner inputWeight = new Scanner(System.in);
//    double weight = inputWeight.nextDouble();
//    System.out.println("请输入身高");
//    Scanner inputHeight = new Scanner(System.in);
//    double height = inputHeight.nextDouble();
//    calBMI(weight,height);
   System.out.println("1、进行BMI体重计算\n2、进行非闰年测算\n\t\t请输入你的选择");
   Scanner inputOption = new Scanner(System.in);
   int option = inputOption.nextInt();
   if(option ==1){
         calBMI();
   }
   else if(option ==2){
         calLeapYear();
   }
   else {
         System.out.println("！！！！输入错误请重试");
   }

}

public static void calBMI(){
   System.out.println("请输入体重 /kg");
   Scanner inputWeight = new Scanner(System.in);
   double weight = inputWeight.nextDouble();
   System.out.println("请输入身高 /m");
   Scanner inputHeight = new Scanner(System.in);
   double height = inputHeight.nextDouble();

   double MBI = weight / (height * height);
   System.out.println("当前BMI值：" + MBI);

   if(MBI >= 35){
         System.out.println("当前重度肥胖");
   }
   else if(MBI >= 30){
         System.out.println("当前中度肥胖");
   }
   else if (MBI >= 27){
         System.out.println("当前轻度肥胖");
   }
   else if (MBI >=24){
         System.out.println("当前体重过重");
   }
   else if (MBI >= 18.5){
         System.out.println("当前体重位正常");
   }
   else {System.out.println("当前体重过轻");}
}

public static void calLeapYear(){
   System.out.println("请输入年份");
   Scanner inputYear = new Scanner(System.in);
   int YEAR = inputYear.nextInt();

   if( YEAR % 4 ==0 && YEAR % 100 >0&& YEAR % 400 ==0){
         System.out.println("当前年份"+YEAR+"当前是闰年");
   }
   else {System.out.println("当前年份"+YEAR+"当前是非闰年");}
}
}

yumson 发表于 2021-8-12 23:32:48

111

Thuu 发表于 2021-8-27 00:27:58

package com.Study.fishc;

import java.util.Scanner;
import java.util.regex.PatternSyntaxException;

/**
* @Description BMI指数
* ----------------------------
* 体重过轻 BMI <18. 5
* 正常范围 18. 5<= BMI < 24
* 体重过重 24<= BMI < 27
* 轻度肥胖 27<= BMI < 30
* 中度肥胖 30<= BMI < 35
* 重度肥胖 35<=BM I
* -------------------------------
* BMI的计算公式是体重(kg) / (身高*身高)
* @Classname BmiWeight
* @Date 2021/8/26 23:40
* @Created by 折腾的小飞
*/
public class BmiWeight {
public static void main(String[] args) throws Exception {
   System.out.println("请输入身高(m)：");
   Scanner scanner = new Scanner(System.in);
   double height = scanner.nextDouble();
   scanner.nextLine(); // 接收空格
   System.out.println("请输入体重(kg)：");
   double weight = scanner.nextDouble();
   System.out.println(getBmi(height, weight));
}
/**
* description: 计算BMI指数
* @since: 1.0.0
* @author: 涂鏊飞tu_aofei@163.com
* @date: 2021/8/27 0:12
* @Param height:
* @Param weight:
* @return: java.lang.String
*/
private static String getBmi(double height, double weight) throws Exception {

   // 判断是否为0或null
   if (weight == 0 || Double.isNaN(weight) || Double.isNaN(height)) {
         throw new ArithmeticException("被除数不能为0!");
   }
   // 体重为0
   if(height==0){
         throw new Exception("身高异常！");
   }
   double bmi = weight / Math.pow(height, 2);
   String[] msg = {"当前的BMI是：", "身体状态是："};
   String[] info = {"重度肥胖", "中度肥胖", "轻度肥胖", "体重过重", "正常范围", "体重过轻"};
   if (bmi >= 35) {
         return msg + bmi + "\n" + msg + info;
   } else if (bmi >= 30) {
         return msg + bmi + "\n" + msg + info;
   } else if (bmi >= 27) {
         return msg + bmi + "\n" + msg + info;
   } else if (bmi > 24) {
         return msg + bmi + "\n" + msg + info;
   } else if (bmi > 18.5) {
         return msg + bmi + "\n" + msg + info;
   } else {
         return msg + bmi + "\n" + msg + info;
   }
}
}

Thuu 发表于 2021-8-27 00:40:48

package com.Study.fishc;

import java.util.Scanner;

/**
* @Description 闰年
* @Classname LeapYear
* @Date 2021/8/27 0:32
* @Created by 折腾的小飞
*/
public class LeapYear {
public static void main(String[] args) throws Exception {
   System.out.println("请输入要判断的年份：");
   Scanner scanner = new Scanner(System.in);
   int year = scanner.nextInt();
   System.out.println(isLearYear(year));
}

private static boolean isLearYear(int year) throws Exception {
   if (Double.isNaN(year) || year<=0){
         throw newException("年份不正确！");
   }
   if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
         return true;
   }
   return false;
}
}

唯有无奈 发表于 2021-9-11 08:29:07

import java.util.Scanner;
/*
使用Scanner收集身高体重，并计算BMI值
BMI的计算公式是体重(kg) / (身高*身高)

*/

public class Bmi
{
public static void main(String[] args){
Scanner input = new Scanner(System.in);//从键盘接收数据

float height = 0.0f;
float weight = 0.0f;
float BMI = 0.0f;

System.out.println("请输入身高(m):");
height = input.nextFloat();
System.out.println("请输入体重(kg):");
weight = input.nextFloat();
BMI = weight / ( height * height);
System.out.println("当前的BMI是："+BMI);

if(BMI < 18.5)
{System.out.println("体重过轻");}
else if(18.5 <= BMI && BMI < 24)
{System.out.println("正常范围");}
else if(24 <= BMI && BMI < 27)
{System.out.println("体重过重");}
else if(27 <= BMI && BMI < 30)
{System.out.println("轻度肥胖");}
else if(30 <= BMI && BMI < 35)
{System.out.println("中度肥胖");}
else
{System.out.println("重度肥胖");}

}
}

轩少不冷 发表于 2021-12-30 14:44:29

请为为什么可以用 | 这个符号呢这个不是或么
我是新手求解答{:10_254:}

yxlml 发表于 2022-1-7 18:17:42

想看

Sunnysun. 发表于 2023-9-24 23:42:05

加油

xx觿xx 发表于 2023-9-25 20:14:26

顶聪明的芥子 发表于 2024-2-4 20:32:49

{:5_109:}

宵夜yeyeyeye 发表于 2024-4-23 08:50:03

很有帮助

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