1首先标(biāo )准只(zhī )是(shì )规定(dìng )了这些函数的接口(kǒu )和具体(tǐ )的运行效率的要求,这些(xiē )函(hán )数(shù )具(jù )体是怎么(me )写得(dé )要(yào )看各个(gè )编译(yì )器的实(shí )现(xiàn )和平台(tái )2例如(rú )使用(yòng )的编(biān )译器是visual studio,微软(ruǎn )提(tí )供了一(yī )部分C运行时CRT的源码,里(lǐ )面会有(yǒu )memcpy,strcpy之类的
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