Introduction - If you have any usage issues, please Google them yourself
This case simulation drinks the vending machine the sales process. First of all by the customer coin, slot machine showed that amount. The next to buy drinks customer choice, if the slot for a drink enough amount and existence, the prompt the user at take beverage, and at the same time change. If the coin is not paid, they showed a hint of information. If buy drinks have sold out, show sold out information