机器有3个投币按键，代表3种硬币输入（1元，5角和1 角）。每按一键，表示投入一枚硬币，购票者可选择的邮票面值有1元和5角两种，每次售出1 枚邮票。 购票者投币后，按动确认键，机器将发出邮票和找零硬币，若所投金额不足则发出“欠资”指示。

Packet : 数字系统课程设计---自动售邮票机.rar filelist
数字系统课程设计---自动售邮票机.doc

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