save project

diy2.py

+b=6
 username = "20170904"
 userpassword = "19481201"
 while True:
+    if  b>0:
         name = input("给我输入用户名:")
         password = input("给我输入密码:")
+        b=b-1
         if name == username and password == userpassword:
             print("登录成功!")
 
@@ -13,5 +16,7 @@ while True:
         else:
             if password != userpassword:
                 print("密码错误!给我重新输入")
-   
+    else:
+        print("**账号去世，请换一个")
+        exit()
 print("欢迎来到贝尔编程!")
\ No newline at end of file