logging

LOG.c

#include <time.h>
#include <stdio.h>
#include <stdarg.h>

void LOG(const char* fmt, ...) {
  va_list args;
  va_start(args, fmt);
  char msg[256];
  vsprintf(msg, fmt, args);
  va_end(args);

  char buff[256];
  time_t t = time(NULL);
  strftime(buff, sizeof(buff), "[%x - %X]", localtime(&t));
  printf("%s %s\n", buff, msg);
}