中文说明：层次分析法（AHP）是进行评估的一种常用方法，其中层次分析法中求随机一致性指标是该方法的关键一步。本程序即实现的求解PI的程序
English Description：
Analytic hierarchy process (AHP) is a common method for evaluation, in which the key step is to find the random consistency index. This program is the program of solving PI