C++数值运算的常用算法，包括项式与连分式计算、矩阵运算、线性方程组求解、 非线性方程组求解、数值积分、数据处理与回归分析、数学变换与滤波等-C++ numerical computation of the commonly used algorithms, including the item type and continued fractions, the matrix operations, solving linear equations, solving systems of non