public DivideResult Div(double x, double y)
{
if (y == 0)
{
return(DivideResult.ErrorResult());
}
else
{
return(DivideResult.SuccessResult(x / y));
}
}
static DivideResult Devide(int n1, int n2) // 2번 메소드
{
DivideResult ret = new DivideResult(); // 아이디어는 좋은데
if (n2.Equals(0)) // 구조체를 할당하므로
{
ret.Success = false; // 메모리를 낭비한다.
return(ret); // 어차피 곧바로 쓰고
}
ret.Success = true; // 버려질 구조체인데
ret.Result = n1 / n2; // 메소드도 복잡해진다.
return(ret);
}
public static DivideResult PolyLongDivision(BigRational[] dividend, BigRational[] divisor)
{
DivideResult divideResult = new DivideResult();
BigRational[] bufferDividend = dividend;
int divisorMaxPower = divisor.Length - 1;
BigRational divisorMaxCoeff = divisor.Last();
BigRational[] result = new BigRational[dividend.Length];
while (true)
{
long dividentMaxPower = bufferDividend.Length - 1;
long resultXPower = dividentMaxPower - divisorMaxPower;
if (resultXPower < 0)
{
divideResult.Quotient = RemoveUselessZeros(result);
divideResult.Remainder = RemoveUselessZeros(bufferDividend);
return divideResult;
}
BigRational dividentCoeff = bufferDividend.Last();
BigRational resultCoeff = dividentCoeff/divisorMaxCoeff;
result[resultXPower] = resultCoeff;
BigRational[] buffSubtract = new BigRational[bufferDividend.Length].Select(h => new BigRational(0,1)).ToArray();
Array.Copy(divisor, 0, buffSubtract, resultXPower, divisor.Length);
Parallel.For(0, buffSubtract.Length, i => buffSubtract[i] *= resultCoeff);
bufferDividend = ArraySubtrInts(bufferDividend, buffSubtract);
bufferDividend = RemoveUselessZeros(bufferDividend);
}
}
public static DivideResult PolyLongDivision(BigRational[] dividend, BigRational[] divisor)
{
DivideResult divideResult = new DivideResult();
BigRational[] bufferDividend = dividend;
int divisorMaxPower = divisor.Length - 1;
BigRational divisorMaxCoeff = divisor.Last();
BigRational[] result = new BigRational[dividend.Length];
while (true)
{
long dividentMaxPower = bufferDividend.Length - 1;
long resultXPower = dividentMaxPower - divisorMaxPower;
if (resultXPower < 0)
{
divideResult.Quotient = RemoveUselessZeros(result);
divideResult.Remainder = RemoveUselessZeros(bufferDividend);
return(divideResult);
}
BigRational dividentCoeff = bufferDividend.Last();
BigRational resultCoeff = dividentCoeff / divisorMaxCoeff;
result[resultXPower] = resultCoeff;
BigRational[] buffSubtract = new BigRational[bufferDividend.Length].Select(h => new BigRational(0, 1)).ToArray();
Array.Copy(divisor, 0, buffSubtract, resultXPower, divisor.Length);
Parallel.For(0, buffSubtract.Length, i => buffSubtract[i] *= resultCoeff);
bufferDividend = ArraySubtrInts(bufferDividend, buffSubtract);
bufferDividend = RemoveUselessZeros(bufferDividend);
}
}