c++获取时间戳

#include <iostream>
#include <string>
#include <time.h>
using namespace std;

struct NowDate
{
    char tmp0[16]; //年月日
    char tmp1[16]; //时分秒
    char tmp2[4];  //毫秒
};

NowDate getTime()
{
    time_t timep;
    time (&timep);
    NowDate date;

    strftime(date.tmp0, sizeof(date.tmp0), "%Y-%m-%d",localtime(&timep) );
    strftime(date.tmp1, sizeof(date.tmp1), "%H:%M:%S",localtime(&timep) );

    struct timeb tb;
    ftime(&tb);     
    sprintf(date.tmp2,"%d",tb.millitm);

    return date;
}

int main()
{
    NowDate time = getTime();
    cout << time.tmp0 <<endl;
    cout << time.tmp1 <<endl;
    cout << time.tmp2 <<endl;

    return 0;
}