AB 1746-IB16AB 1746-IB16 AB 1746-IB16
便于程序的分工設(shè)計和檢查調(diào)試。順序功能流程圖的主要元素是步、轉(zhuǎn)移、轉(zhuǎn)移條件和動作。如圖1所示。順序功能流程圖程序設(shè)計的特點(diǎn)是:
(1)以功能為主線,條理清楚,便于對程序操作的理解和溝通;
(2)對大型的程序,可分工設(shè)計,采用較為靈活的程序結(jié)構(gòu),可節(jié)省程序設(shè)計時間和調(diào)試時間;
(3)常用于系統(tǒng)的規(guī)模校大,程序關(guān)系較復(fù)雜的場合;
(4)只有在活動步的命令和操作被執(zhí)行后,才對活動步后的轉(zhuǎn)換進(jìn)行掃描,因此,整個程序的掃描時間要大大縮短。
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