[user02@FC4 Lesson04]$ cat -n 1001too.c

   1  #include <stdio.h>
   2
   3  int main(void)
   4  {
   5     printf("%d%d%d%d\n", 1, 0, 0, 1);
   6
   7     return 0;
   8  }

[user02@FC4 Lesson04]$ gcc -o 1001too 1001too.c
[user02@FC4 Lesson04]$ ./1001too
1001