[user02@FC4 Lesson08]$ cat -n dog_cat.c

   1  #include <stdio.h>
   2
   3  int main(void)
   4  {
   5     int user_owns_a_dog = 1;
   6     int user_owns_a_cat = 0;
   7
   8     if (user_owns_a_dog)
   9        printf("Dogs are great\n");
  10
  11     if (user_owns_a_cat)
  12        printf("Cats are great\n");
  13
  14     if ((user_owns_a_dog) && (user_owns_a_cat))
  15        printf("Dogs and cats can get along\n");
  16
  17     if ((user_owns_a_dog) || (user_owns_a_cat))
  18        printf("Pets are great!\n");
  19
  20     return 0;
  21  }

[user02@FC4 Lesson08]$ gcc -o dog_cat dog_cat.c
[user02@FC4 Lesson08]$ ./dog_cat
Dogs are great
Pets are great!