1首先(xiān )标(biāo )准(zhǔn )只(zhī )是(shì )规(guī )定了(le )这些函数的接(jiē )口和具体(tǐ )的运行效率(lǜ )的(de )要(yào )求,这些(xiē )函数具(jù )体是怎么写(xiě )得要看(kàn )各个编译(yì )器的实现和平(píng )台2例如(rú )使用的编译(yì )器是visual studio,微软提(tí )供了一部(bù )分C运(yùn )行时CRT的源(yuán )码,里面会(huì )有memcpy,strcpy之(zhī )类的
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