代码

#include<string.h>
inline void m(int q, int* a, unsigned n, unsigned d) {
n&=~31;
while(n){a[0]=a[1]=a[2]=a[3]=a[4]=a[5]=a[6]=a[7]=q;n-=32;a+=8;}
*(int*)&a += d;a[0]=a[1]=a[2]=a[3]=a[4]=a[5]=a[6]=a[7]=q;
}
void my_memset(char *a, char c, unsigned n) {
while(31&(int)a)*a++=c,--n;
int q=c*0x1010101;
m(q,(int*)a,n,(n&31)-32);
}

评测结果