This paper analyzes arithmetic method of Romberg Integral, and designs an adstract class to accomplish it. At last it introduces how to use the adstract class with 2 instances.

• 摘要分析龙贝格数值积分算法，设计实现龙贝格数值积分的抽象类，并用2个实例介绍了抽象类的使用。