save project

diy2.py

@@ -6,8 +6,10 @@ while True:
     if name == username and password == userpassword:
     if name == username and password == userpassword:
         print("登录成功!")
         print("登录成功!")
         break
         break
-    if name!=username:
-        print("")
-    print("c")
-print("欢迎来到贝尔编程!")
+    if name == username:
+        print("用户名错误!请重新输入")
+    if name == userpassword:
+        print("用密码错误!请重新输入")
+    print("用户名和密码错误!请重新输入")
+    print("欢迎来到贝尔编程!")
     
     
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