递归算法示例计算,供相互学习之用.他可计算:n的1次方到n的k次方的和.-Example calculation of recursive algorithm, for mutual learning. He Computable: n-th power of 1 to n and the k-th power.

常用数据结构，人工神经网络BP算法(含说明）-Common data structures, artificial neural network BP algorithm (including instructions)