算法的基本思想是探求解决问题的一般性方法,并将解决问题的步骤用具体化、程序化的语言加以表述,即所谓的程序化思想.描述算法的方式主要有三种:自然语言、流程图、程序设计语言(伪代码),其中流程图直观形象,能体现算法过程的结构特征.事实上,算法都可以由顺序结构、选择结构 The basic idea of ​​the algorithm is to search for a general method of solving the problem, and the steps to solve the problem are expressed in concrete and procedural language, that is, the so-called procedural thinking. There are mainly three ways to describe the algorithm: natural language, flow chart , programming language (pseudo-code), in which the flow chart visual image, can reflect the structural characteristics of the algorithm process. In fact, the algorithm can be from the order structure, select the structure