| 摘要 |
PROBLEM TO BE SOLVED: To always complete a proper prize exchange processing correspondingly to a plurality of exchange rates. SOLUTION: Data containing the number of game media and exchange rates to be selected are inputted into a control part 1 through a communication part 4, or the like. The control part 1 performs a prize exchange processing for subtracting the number of game media corresponding to prizes to be exchanged from the number of the game media based on the number of game media and the exchange rates. When an ending direction is given by an 'end' button of an operating part 3, the control part 1 ends the prize exchange processing with condition that the number of the game media (reside) after the subtraction in the prize exchange processing is below an end possible value stored in a memory part 2. The memory part 2 stores the plurality of exchange rates and the end possible reside corresponding to each of the exchange rates. Thus, the control part 1 can end the prize exchange processing with the end possible residue corresponding to the inputted exchange rates as reference.
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