save project

diy2.py

@@ -6,8 +6,9 @@ while True:
     if name == username and password == userpassword:
         print("登录成功!")
         break
-    if name! = username:
-        print("用户名不存在")
-    if password! = userpassword
-    print("用户名和密码错误!请重新输入")
+    if name != username:
+        print("用户名不存在,请重新输入!")
+        continue
+    if password != userpassword:
+        print("密码输入有误,请重新输入!")
 print("欢迎来到贝尔编程!")