OOC2-Example-Output

Jon’s full name: Jonathan Sterling
Jon’s original age: 17
adding 30 years…
Jon’s new age: 47
reverting to infancy…
Jon’s new age: 0
Hi! I’m Jonathan Sterling! Hello World!

OOC2-Example.c

Person jon;
jon.firstName = "Jonathan";
jon.lastName = "Sterling";
jon.age = 17;

char * fullName;
person_getFullName(&fullName, jon);

printf("Jon’s full name: %s\n", fullName);
free(fullName);

printf("Jon’s original age: %i\n", jon.age);
printf("adding 30 years…\n");
person_addToAge(&jon, 30);
printf("Jon’s new age: %i\n", jon.age);

printf("reverting to infancy…\n");
person_revertToInfancy(&jon);
printf("Jon’s new age: %i\n", jon.age);

person_sayHello(jon);

OOC2-Person.c

char * person_getFullName(char ** dest, Person p) {
  *dest = (char *)malloc((strlen(p.firstName) + strlen(p.lastName) + 1) * sizeof(char));
  
  strcpy(*dest, p.firstName);
  strcat(*dest, " ");
  strcat(*dest, p.lastName);
  
  return *dest;
}

Person * person_addToAge(Person * p, int years) {
  p->age += years;
  return p;
}

Person * person_revertToInfancy(Person *p) {
  p->age = 0;
  return p;
}

void person_sayHello(Person p) {
  char * fullName;
  printf("Hi! I'm %s! Hello World!\n", person_getFullName(&fullName, p));
  free(fullName);
}

OOC2-Person.h

typedef struct person_t {
  char * firstName;
  char * lastName;
  int age;
} Person;

char * person_getFullName(char ** dest, Person p);
Person * person_addToAge(Person * p, int years);
Person * person_revertToInfancy(Person * p);
void person_sayHello(Person p);