随着电子技术的发展及人力成本的增加，自助设备迅速发展起来。在自助售卖设备中，自助收币找零是不可缺少的模块，为了找零方便，大部分设备只可以找零一个币种，但是这种找零方式消耗找零币种很快，容易出现零币用完无法继续交易的情况。作者开发的全自助贩卖机上，使用了两个找零币种的方案，如何选择两个币种，是考验机器是否实用的关键因素。本文通过大量的实测数据和逻辑分析，得到了一种最优解决方案，使用这种方案，在保证最大找零额度的前提下，提供更多的找零方式组合，在实际应用中获得了很好的效果。%With the rapidly development of electronic technology and cost in human resources, self-service equipment are more and more used. In self-service vending equipment, cash operator is an indispensable module. Most of the equipment can only change one type of currency, but the currency be used quickly. The author developed a full vending machine, which used two type of currency, How to choose the two currencies is the most important things to be. Through a large number of data analysis, An efficient solution was developed, The solution can support many change methods, and obtained very good result in practical application.
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