auto save

diy2.py

 username = "sb"
 username = "sb"
 userpassword = "666"
 userpassword = "666"
+num=3
 while True:
 while True:
     
     
     name = input("请输入用户名:")
     name = input("请输入用户名:")
@@ -8,4 +9,5 @@ while True:
         print("登录成功!")
         print("登录成功!")
         break
         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")
+    exit()
 print("欢迎来到干饭编程!")
 print("欢迎来到干饭编程!")
\ No newline at end of file