From 36b81791ab6ed1a37710a8cbbd6928b224401288 Mon Sep 17 00:00:00 2001
From: xuxin <840198532@qq.com>
Date: Thu, 16 Jul 2026 14:19:41 +0800
Subject: [PATCH] =?UTF-8?q?day03-if=E7=9A=84=E7=BB=BC=E5=90=88=E5=B0=8F?=
 =?UTF-8?q?=E6=A1=88=E4=BE=8B?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 day03/src/com/inmind/if01/Demo02.java | 35 +++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 day03/src/com/inmind/if01/Demo02.java

diff --git a/day03/src/com/inmind/if01/Demo02.java b/day03/src/com/inmind/if01/Demo02.java
new file mode 100644
index 0000000..12f0bcc
--- /dev/null
+++ b/day03/src/com/inmind/if01/Demo02.java
@@ -0,0 +1,35 @@
+package com.inmind.if01;
+/*
+指定考试成绩，判断学生等级
+90-100 优秀
+80-89 好
+70-79 良
+60-69 及格
+60以下 不及格
+
+分析：
+1.定义一个成绩变量score
+2.使用if格式三，根据不同的判断条件，输出各自学生的等级
+
+ */
+public class Demo02 {
+    public static void main(String[] args) {
+        //定义一个成绩变量score
+        int score = 80;
+        if (score >= 90 && score <= 100) {
+            System.out.println("优秀");
+        } else if (score >= 80 && score <90) {
+            System.out.println("好");
+        }else if(score>=70 && score<=79){
+            System.out.println("良");
+        }else if(score>=60 && score<=69){
+            System.out.println("及格");
+        }else if(score<=59&&score>=0){
+            System.out.println("不及格");
+        }else{//else是可以不写，要不要写要根据具体的业务题目来分析
+            System.out.println("您输入的成绩有误");
+        }
+
+        System.out.println("程序结束");
+    }
+}