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