MakeDirectory

#include <stdio.h>
#include <sys/stat.h>
#include <time.h>
int main(void) {
  char s[BUFSIZ];
  time_t today_time = time(NULL);
  struct tm *today = localtime(&today_time);
  strftime(s, BUFSIZ, "data%Y%m%d", today);
  mkdir(s, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH | S_IWOTH | S_IXOTH);
  return 0;
}