代码

void my_memset(char *a,register const char c,const unsigned n) {
	char *t=a+n,*s=a;
	while (s+4<=t){
		*s=c;
		*(s+1)=c;
		*(s+2)=c;
		*(s+3)=c;
		s+=4;
	}
	while (s<t)
		*(s++)=c;
}

评测结果