特征线法，计算自由边界子程序，当边界压力人为给定时，计算自由边界点的位置(MOC program,used to compute the free boundary which pressure distribution is set artificially)

NASA的喷管设计程序，采用特征线方法，JAVA设计语言。(A Java Application to perform two dimensional analysis of supersonic flow through nozzles using the method of characteristics.)