save project

diy2.py

-
-
-
-
-
+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
+    if name!=username:
+        input("用户名不存在，请重新输入")
+    if password!= userpassword:
+       input("密码错误，请重新输入")
+print("欢迎来到贝尔编程！")