C++ (Cpp) Poly::reserve示例

Poly integral(Poly const & p) {
    Poly result;
    
    result.reserve(p.size()+1);
    result.push_back(0); // arbitrary const
    for(unsigned i = 0; i < p.size(); i++) {
        result.push_back(p[i]/(i+1));
    }
    return result;

}

示例#2

显示文件

文件： poly.cpp 项目： luzpaz/scribus

Poly derivative(Poly const & p) {
    Poly result;
    
    if(p.size() <= 1)
        return Poly(0);
    result.reserve(p.size()-1);
    for(unsigned i = 1; i < p.size(); i++) {
        result.push_back(i*p[i]);
    }
    return result;
}

示例#3

显示文件

文件： SparseMatrix.cpp 项目： Macaulay2/mathicgb

void SparseMatrix::rowToPolynomial(
  const RowIndex row,
  const std::vector<PolyRing::Monoid::ConstMonoPtr>& colMonomials,
  Poly& poly
) {
  poly.setToZero();
  poly.reserve(entryCountInRow(row));
  const auto end = rowEnd(row);
  for (auto it = rowBegin(row); it != end; ++it) {
    MATHICGB_ASSERT(it.index() < colMonomials.size());
    if (it.scalar() != 0)
      poly.append(it.scalar(), *colMonomials[it.index()]);
  }
  MATHICGB_ASSERT(poly.termsAreInDescendingOrder());
}