save project

diy2.py

@@ -5,9 +5,9 @@ while True:
     password = input("请输入密码:")
     if name == username and password == userpassword:
         print("登录成功!")
-    if name != username :
+    elif name!=username :
         print("用户名错误")
         break
-    if password!=userpassword and name == username:
+    else :
         print("密码错误")
 print("欢迎来到贝尔编程!")
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