1首先标(biāo )准只(zhī )是规定了这(zhè )些函数(shù )的接口和具体的运行效率的要求,这(zhè )些(xiē )函数具体是(shì )怎(zěn )么写(xiě )得(dé )要(yào )看(kàn )各个编译(yì )器的实现(xiàn )和平(píng )台2例如使用(yòng )的编译器是visual studio,微(wēi )软(ruǎn )提供(gòng )了(le )一(yī )部分C运(yùn )行时CRT的源(yuán )码(mǎ ),里面会(huì )有(yǒu )memcpy,strcpy之类的
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