关于结构体的复制

struct st_task
{
    uint16_t id;
    uint32_t value;
    uint64_t timestamp;
};

void fool()
{
    st_task task = {};
    uint64_t a = 0x00010001;
    memcpy(&task, &a, sizeof(uint64_t));
    printf("%11u,%11u,%11u", task.id, task.value, task.timestamp);
}

复制结构体时，从低位到高位，所以对于task的划分，很明了了