一,拷贝:
char stpcpy(char *dest,const char *src) 将字符串src复制到dest
char strncpy(char *dest,const char *src,size_t maxlen) 复制src中的前maxlen个字符到dest中
char strnset(char *s,int ch,size_t n) 将字符串s的前n个字符置于ch中
void *memchr(void *s,char ch,unsigned n)
void *memcmp(void *s1,void *s2,unsigned n)
int memicmp(void *s1,void *s2,unsigned n)
void *memmove(void *destin,void *source,unsigned n)
void *memcpy(void *destin,void *source,unsigned n)
void *memset(void *s,char ......
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