save project

diy1.py

@@ -6,5 +6,8 @@ while True:
     if  username==name  and uesrpassword==password:
         print("登陆成功！") 
         break
-    print("输入错误，请重新输入")
+    if username!=name:
+        print("用户名不存在，请重新输入")
+    if userpassword!=password:
+        print("密码错误,请重新输入")
 print("欢迎来到贝尔编程！")
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