Height-Speed-Chart传入的坐标为什么为double型，如何在控件类里修改为in型

void CChartXYSerie::AddPoints(double* pX, double* pY, unsigned Count)
{
SChartXYPoint* pPoints = new SChartXYPoint[Count];
for (unsigned i=0; i {
pPoints[i].X = pX[i];
pPoints[i].Y = pY[i];
}
CChartSerieBase::AddPoints(pPoints, Count);
delete pPoints;
}

可以把他强转为int类型