save project

diy2.py

@@ -6,9 +6,8 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    if nema != username:
+    elif nema != username:
         print("用户名不存在，请重新输入！")
-        continue
-    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!")