1首先标(biāo )准(zhǔn )只是(shì )规定了这些(xiē )函(hán )数的接(jiē )口和具体的运行(háng )效(xiào )率(lǜ )的要求,这些函数(shù )具(jù )体(tǐ )是怎么写(xiě )得要看各(gè )个编译器的实现(xiàn )和平台(tái )2例如使(shǐ )用的编(biān )译器(qì )是visual studio,微(wēi )软提供了(le )一部(bù )分C运行时CRT的源(yuán )码(mǎ ),里面(miàn )会有memcpy,strcpy之(zhī )类的
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