save project

diy1.py

@@ -6,5 +6,8 @@ while True:
     if c==username and d==userpassword:
         print("登陆成功")
         break
-    print("用户名和密码错误，请从新输入")
+    if c !=username:
+        print("用户名错误，请从新输入")
+    if d !=userpassword:
+        print("密码错误，请从新输入")
 print("欢迎来到贝儿编程")
\ No newline at end of file