GfxFont类是文字类 在主函数中创建GfxFont的对象或指针，然后在render函数中用对象或指针调用Print(x坐标,y坐标,"内容",有值变量) 就可一写绘制出字了-GfxFont class is writing classes in the main function creates an object or GfxFont pointer, and then render an object or a pointer using the function called Print (x coordinate, y coordinate, " content" , there is the value of variables)　can be drawn out of a written word a