1首先(xiān )标准只(zhī )是(shì )规定了这(zhè )些函数的接(jiē )口和具体的运(yùn )行(háng )效率的要求(qiú ),这些(xiē )函数(shù )具体(tǐ )是怎么写得要看各个编译(yì )器的实现(xiàn )和(hé )平台(tái )2例如使用的(de )编译(yì )器是visual studio,微软(ruǎn )提(tí )供(gòng )了一(yī )部(bù )分(fèn )C运行时(shí )CRT的源码,里面(miàn )会有(yǒu )memcpy,strcpy之类的
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