auto save

demo1.py

+i = 0
+while i <5:
+    i=i+1
+    if i==3:
+        continue
+    print(i)
\ No newline at end of file

diy2.py

@@ -6,5 +6,8 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    print("用户名和密码错误!请重新输入")
+    if name != username:
+        print("用户名不存在，请重新输入！")
+    if password != userpassword:
+        print("密码输入错误，请重新输入！")
 print("欢迎来到贝尔编程!")
\ No newline at end of file