[user02@FC4 Lesson10]$ cat -n two_msgs.c

   1  #include <stdio.h>
   2
   3  void show_title(void)
   4  {
   5     printf("Book: Rescued by C\n");

   6  }
   7
   8  void show_lesson(void)
   9  {
  10     printf("Lesson: Getting Started With Functions\n");
  11  }
  12
  13  int main(void)
  14  {
  15     show_title();
  16     show_lesson();
  17
  18     return 0;
  19  }

[user02@FC4 Lesson10]$ gcc -o two_msgs two_msgs.c
[user02@FC4 Lesson10]$ ./two_msgs
Book: Rescued by C
Lesson: Getting Started With Functions
[user02@FC4 Lesson10]$