1首先标准只(zhī )是规定(dìng )了这些(xiē )函(hán )数的接口(kǒu )和(hé )具体的运(yùn )行效率的要(yào )求(qiú ),这些(xiē )函数具体是怎么写(xiě )得要看各(gè )个编译(yì )器的实现和(hé )平台(tái )2例如(rú )使用(yòng )的编(biān )译器是(shì )visual studio,微(wēi )软提(tí )供了一部(bù )分C运(yùn )行时CRT的源(yuán )码,里(lǐ )面会有(yǒu )memcpy,strcpy之类的
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