save project

diy2.py

@@ -6,10 +6,10 @@ while True:
     if name == username and password == userpassword:
     if name == username and password == userpassword:
         print("登录成功")
         print("登录成功")
         break
         break
-    if name!=username:
+    elif name!=username:
         print("用户名不存在，请重新输入")
         print("用户名不存在，请重新输入")
         continue
         continue
-    if password!= userpassword:
+    else :
         print("密码错误，请重新输入")
         print("密码错误，请重新输入")
 print("欢迎来到贝尔编程！")
 print("欢迎来到贝尔编程！")