save project

diy2.py

@@ -6,9 +6,11 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    if  name != username:
+    elif  name != username and password == userpassword:
         print("用户名输入错误")
-        continue
-    if  password != userpassword:
+    elif  name != username and password != userpassword:
+        print("用户名和密码输入错误")
+    else:
+        password != userpassword 
         print("密码输入错误")
 print("欢迎来到贝尔编程!")
\ No newline at end of file