实现数值分析中的一些基本算法，Jacobi、Gauss、Gauss-Seidel、拉格朗日插值以及列主元高斯消去发等-Some of the basic algorithm in numerical analysis

Runge现象的验证，内有可选项：拉格朗日插值法、牛顿插值法和分段线性插值法。-The Runge phenomenon verification, with optional: Lagrange interpolation, Newton interpolation and piecewise linear interpolation.