你建一个程序就可以了，给你个简单的吧,比方如用户名是张三，密码是1234
accept "请输入用户名:" to name
accept "请输入密码:" to pass
n=1
do while .t
if name="张三"
if pass="1234"
?"恭喜你！“
exit
else
?'密码错误!"
n=n+1
endif
else
?"用户名错误！"
n=n+1
endif
if n=3
?"你超过三次，系统禁止你登录!"
exit
else
clear
?"请重新输入:"
accept "请输入用户名:" to name
accept "请输入密码:" to pass
endif
enddo
return