save project

diy1.py

@@ -10,5 +10,10 @@ while True:
     if name==username and password==userpassword:
         print("登入成功") 
         break
-    print("账号或密码错误，请重新输入")
+    if name!=username:
+         print("用户名不存在,请重新输入")
+    if password!=userpassword:
+         print("密码错误,请重新输入")
+    
+
 print("欢迎来到贝尔编程！")
\ No newline at end of file