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

   1  #include <stdio.h>
   2
   3  void show_message(void)
   4  {
   5     printf("Hello, I've been Rescued by C\n");

   6  }
   7
   8  int main(void)
   9  {
  10     printf("About to call the function\n");
  11     show_message();
  12     printf("Back from the function\n");
  13
  14     return 0;
  15  }

[user02@FC4 Lesson10]$ gcc -o show_msg show_msg.c
[user02@FC4 Lesson10]$ ./show_msg
About to call the function
Hello, I've been Rescued by C
Back from the function
[user02@FC4 Lesson10]$