计算方法课程里两个经典的算法实现——Romgerg求积法，最小拟合二乘法。算法书上都有，这是对算法完整的实现，很详细，调试运行通过，刚学习计算方法的朋友可以拿去参考。-Calculation of the classical curriculum in the two algorithms- Romgerg quadrature method, the minimum squares fitting. Algorithms have the book, which is the realizat