save project

diy2.py

 username = "1"
 userpassword = "123456"
 while True:
+    if i>0
         name = input("请输入用户名:")
         password = input("请输入密码:")
+        i=0
         if name == username and password == userpassword:
             print("登录成功!")
             break
@@ -11,4 +13,7 @@ while True:
             continue
         if password != userpassword:   
             print(nb)
+else:
+    print("SB")
+    exit()
 print("欢迎来到贝尔编程!")
\ No newline at end of file