save project

diy2.py

@@ -6,6 +6,8 @@ while True:
     if a == username and b == userpassword:
         print("登录成功!")
         break
-    else:
-        print("用户名和密码错误!请重新输入")
+    if username != a:
+        print("用户名错误!请重新输入")
+    if userpassword != b:
+        print("密码错误!请重新输入")
 print("欢迎")
\ No newline at end of file