一个GUI开发界面的24点小游戏，由4个数通过加减乘除计算得24.通过随机生成或者手动输入4个数，点计算按钮，界面中会列出所有能够得出24的公式-Development of a GUI interface, 24-point game, from 4 Math calculated by the number 24. Through the randomly generated or manually enter the number 4, point calculation button, the interface will list all the formulas can be derived 24