改程序为积分计算器，对给定的函数 （如 等），能够按照三种数值积分法进行计算，并能正确输出计算结果。其中，所采用的数值积分法为：梯形求积公式、辛普森求积公式、高斯公式。-Reform procedures for the points calculator, for a given function (eg, etc.), in accordance with the three numerical integration method to calculate and correct output results. Which used numerical integration method as follows: trapezoidal quadrature formula, Simpson quadrature formula, Gaussian formula.