实时显示时间

#include <unistd.h>
#include <time.h>
#include <iostream>
#include "select_timer.hpp"
using namespace std;
void show_current_time() {
    time_t tt = {0};
    time(&tt);
    struct tm *tm_info = localtime(&tt);
    if (nullptr == tm_info) {
        return;
    }
    char buf[128] = "";
    strftime(buf, sizeof(buf), "Now Time is %Y/%m/%d %H:%M:%S", tm_info);
    cout << buf << endl;
}
int main() {
    select_timer(show_current_time, 1);
    while (1) {
        sleep(100000);
    }

    return 0;
}