save project

diy2.py

@@ -6,5 +6,9 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    else:print("用户名和密码错误!请重新输入")
-print("欢迎来到贝尔编程!")
\ No newline at end of file
+    elif:name != username and password==userpassword:
+        print("用户名错误")
+    elif:name ==username and password!=userpassword:
+        print("密码错误")
+    elif:name != userpassword and password != userpassword:
+        print("错误")
\ No newline at end of file