1首先标准(zhǔn )只是(shì )规定了这些函数(shù )的接(jiē )口和(hé )具(jù )体的(de )运行效率的要求(qiú ),这些(xiē )函(hán )数(shù )具体(tǐ )是(shì )怎么写(xiě )得要(yào )看(kàn )各个编译(yì )器的实(shí )现和平(píng )台2例如使用的编译器是visual studio,微(wēi )软提供了一(yī )部(bù )分C运行时CRT的源(yuán )码,里面(miàn )会(huì )有memcpy,strcpy之类的
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