//多项式的指数运算
private bool Pow(MultinomialC a, MultinomialC b, out MultinomialC out1)
{
out1 = null;
if (b.count == 0)
{
if (a.count == 0)
{
MessageBox.Show("不能计算0的0次幂");
return false;
}
try
{
out1 = new MultinomialC(new MultinomialB(1));
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
return true;
}
if (!b.IsNumber())
{
Error = "指数不能是多项式";
return false;
}
if (a.count == 0)
{
try
{
out1 = new MultinomialC();
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
return true;
}
if (a.IsNumber())
{
try
{
out1 = new MultinomialC(new MultinomialB(Math.Pow(a.Buf[0].coefficient, b.Buf[0].coefficient)));
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
if (Double.IsNaN(out1.Buf[0].coefficient))
return false;
return true;
}
int n = (int)b.Buf[0].coefficient;
if (n < 0)
{
Error = "多项式不能计算负数的幂";
return false;
}
try
{
out1 = new MultinomialC(a);
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
for (int i = 1; i < n; i++)
out1 = MUL(out1, a);
return true;
}
//多项式除以一个数值
private bool Div(MultinomialC a, MultinomialC b, out MultinomialC out1)
{
out1 = null;
try
{
out1 = new MultinomialC(a);
}
catch (Exception)
{
Error = "内存空间不足";
return false;
}
if (b.count == 0)
{
Error = "0不能做除数";
return false;
}
if (!b.IsNumber())
{
Error = "多项式不能做除数";
return false;
}
if (out1.count == 0)
return true;
if (out1.IsNumber())
{
out1.Buf[0].coefficient /= b.Buf[0].coefficient;
return true;
}
Double n = (int)b.Buf[0].coefficient;
for (int i = 0; i < out1.count; i++)
out1.Buf[i].coefficient /= n;
return true;
}