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bcmp
Ô­ÐÍ£ºextern int bcmp(const void *s1, const void *s2, int n);
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bcopy   
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bzero
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memccpy  
   Ô­ÐÍ£ºextern void *memccpy(void *dest, void *src, unsigned char ch,
unsigned int count);
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memchr 
   Ô­ÐÍ£ºextern void *memchr(void *buf, char ch, unsigned count);
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memcmp
   Ô­ÐÍ£ºextern int memcmp(void *buf1, void *buf2, unsigned int count);    
 
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memcpy
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