#include <vector>
#include <string>
#include <iostream>
#include <ctime>

int main()
{
   char buff[20];
   time_t timestamp = 1469870826;
   std::strftime(buff, sizeof(buff), "%Y:%m:%d %H:%M:%S", std::localtime(&timestamp));
   std::string timeStr(buff);

   std::cout << "time = " << timestamp << " | " << timeStr << std::endl;
}