采用数值积分算法中的复化梯形公式和复化Simpson公式计算的近似值的过程和方法，并对比这两种计算公式。理解Romberg算法计算的近似值的过程和方法,并对比以上三种方法。(The procedure and method of calculating the approximate value calculated by the complex trapezoidal formula in the numerical integration algorithm and the complex Simpson formula are compared, and the two calculation formulas are compared. The process and method of understanding the approximate value calculated by the Romberg algorithm and comparing the above three methods.)