save project

diy2.py

@@ -6,9 +6,8 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    elif name!=username:
+    if name!=username:
         print("用户名不存在")
-    else:
+    if password!=userpassword:
         print("密码错误")
-    
 print("欢迎来到贝尔编程!")