save project

diy2.py

@@ -6,8 +6,8 @@ while True:
     if name==username and password==userpassword:
         print("登陆成功")
         break
-    if name!=username:
+    elif name!=username:       
         print("用户名不存在，请重新输入！")
-    if password!=userpassword:
+    else:
         print("密码输入有误，请重新输入！")
 print("欢迎来到贝尔编程!")
\ No newline at end of file