代码

void my_memset(char *a, char c, unsigned n)
{
    unsigned i;
    for (i = 0; i < n; i += 8)
    {
        a[i] = c;
        a[i+1] = c;
        a[i+2] = c;
        a[i+3] = c;
        a[i+4] = c;
        a[i+5] = c;
        a[i+6] = c;
        a[i+7] = c;
    }
    for (; i < n; ++i)
    {
        a[i] = c;
    }
}

评测结果