1首先标准只(zhī )是规(guī )定了(le )这些函数(shù )的接口和(hé )具体的运(yùn )行效率的要(yào )求,这些函(hán )数(shù )具体是(shì )怎么写(xiě )得(dé )要看各个(gè )编(biān )译器(qì )的实(shí )现和(hé )平(píng )台2例如使用的编(biān )译器是visual studio,微软提供了(le )一部(bù )分(fèn )C运行时CRT的源(yuán )码(mǎ ),里面会有memcpy,strcpy之(zhī )类的
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