save project

登录账号diy.py

-username="python"
+username="python"
 username="python"
 userpassword="123456"
-
 while True:
+    name=input("请输入用户名")
+    password=input("请输入密码")
     if name==username and password==userpassword:
         print("登录成功")
         break
-   else:
-       print("登录失败")
+    if name != username:
+        print("用户名输入错误")
+        continue
+    if password!=userpassword:
+        print("密码输入错误")
 print("欢迎来到贝尔编程")
+