vc中获取当前时间戳

以下是在VC中获取当前时间戳的两种方法：

1. 使用gettimeofday获取时间戳初步封装：

double GetTimeStamp(void) {
    double timestamp;
    struct timeval time_v;
    gettimeofday(&time_v, NULL);
    timestamp = (time_v.tv_sec) + (time_v.tv_usec) / 1000000.0;
    return timestamp;
}

2. 使用gettimeofday基本使用：

#include <sys/time.h>
double timestamp;
struct timeval time_v;
gettimeofday(&time_v, NULL);
timestamp = time_v.tv_sec * 1000 + time_v.tv_usec / 1000;
printf("now time: %lf\n", timestamp);