maths.h

快速傅立叶变化的fft算法的C语言实现。

unsigned int Sqrt(unsigned long M);

double lSqrt(unsigned long M );

double fSqrt(double M);

long lRound(long div,long by);

long lAbs(long num);

long lSign(long num);

int Abs( int num );

double fAbs( double num );

unsigned char BCDToHex(unsigned char bcd_data);

unsigned char HexToBCD(unsigned char ten_data);

void Bin2Bcd32( long  x, char* buffer);