save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
-name = input("请输入用户名:")
-password = input("请输入密码:")
 while True:
 while True:
-    break
+    name = input("请输入用户名:")
+    password = input("请输入密码:")
     if name == username and password == userpassword:
     if name == username and password == userpassword:
         print("登录成功!")
         print("登录成功!")
+        continue
+    if name !=userpassword:
+        print('用户名不存在，请重新输入')
+        break
     print("用户名和密码错误!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!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file