diff --git a/day03/src/com/inmind/Demo05_dowhile.java b/day03/src/com/inmind/Demo05_dowhile.java
index 80810cc..c894cad 100644
--- a/day03/src/com/inmind/Demo05_dowhile.java
+++ b/day03/src/com/inmind/Demo05_dowhile.java
@@ -23,7 +23,19 @@ public class Demo05_dowhile {
         System.out.println("程序结束");
 
         //10~1
+        int j = 10;
+        do{
+            System.out.println(j);
+            j--;
+        }while(j>=1);
+        System.out.println("程序结束");
         //a~z
+        int k = 'a';
+        do{
+            System.out.println((char)k);
+            k++;
+        }while(k<='z');
+        System.out.println("程序结束");
 
     }
 }