1首先标(biāo )准只(zhī )是规定了这些函数的接口和(hé )具(jù )体的运(yùn )行效率的要求(qiú ),这(zhè )些(xiē )函数(shù )具体是(shì )怎么写得要看(kàn )各个编译(yì )器的实(shí )现和平(píng )台2例如(rú )使用的(de )编译(yì )器是(shì )visual studio,微(wēi )软提供(gòng )了(le )一部分C运行(háng )时(shí )CRT的源(yuán )码,里面(miàn )会有(yǒu )memcpy,strcpy之类的
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