说明：  labview 实现输入三角形的任意三条边长 自动计算三角形的夹角
(labview Jiao Gui Huang Qianpianshuwen Chongjingsuoqin  chatter Pian strongly Shan ii Liuxianhexian Jibanjingchan Rongjiangsouguo Xieguan Yanfengepu ╃ throw Bentongxiesuo press  chatter Pian strongly Shan ii stay servant chop  chatter)