这是一个关于订购飞机票的程序。在一个文本框中输入月份，另一个中输入张数，按“计算”按钮久得出如此订购可以优惠多少。-This is one of the procedures for ordering airline tickets. In a text input box in another few input-by " calculated"　button so long come to be ordered how many concessions.