顺序查找最大最小值、计算平均值、数据类型转换

分手后的思念是犯贱 2022-05-18 02:08 241阅读 0赞

double calcMax(double *pdData, long lBegin, long lEnd)
{
    long   i   = 0;
    double max = pdData[lBegin];
    for (i = lBegin; i < lEnd; i++)
    {
        if (pdData[i] > max)
        {
            max = pdData[i];
        }
    }
    return max;
}
double calcMin(double *pdData, long lBegin, long lEnd)
{
    long     i = 0;
    double min = pdData[lEnd-1];
    for(i = lEnd-1; i >= lBegin; i--)
    {
        if(pdData[i] < min)
        {
            min = pdData[i];
        }
    }
    return min;
}
double calcMean(double *pdData, long lBegin, long lEnd)
{
    long   i   = 0;
    double dSum = 0.0;
    for(i = lBegin; i < lEnd; i++)
    {
        dSum += pdData[i];
    }
    dSum/=(lEnd - lBegin);
    return dSum;
}
DOUBLE Fixed2Float(SWORD32 fixedData, DOUBLE decimalDigits)
{
    DOUBLE floatData = (DOUBLE)fixedData / (DOUBLE)pow(2, decimalDigits);
    return floatData;
}
SWORD32 Float2Fixed(DOUBLE floatData, DOUBLE decimalDigits)
{
    SWORD32 fixedData = (SWORD32)(floatData * (DOUBLE)pow(2, decimalDigits));
    return fixedData;
}