How Inheritance Works with Memory Diagram

1. How Inheritance Workswith Memory Diagram CSCE 121

2. output struct Person { string name; int weight; }; struct Doctor : public Person { string specialty; }; int main() { Person* p = new Person; p->name = "George"; p->weight = 187; Doctor* d = new Doctor; d->name = "Sam"; d->weight = 165; d->specialty = "surgeon"; Person* w; w = d; } stack identifier heap

3. output struct Person { string name; int weight; }; struct Doctor : public Person { string specialty; }; int main() { Person* p = new Person; p->name = "George"; p->weight = 187; Doctor* d = new Doctor; d->name = "Sam"; d->weight = 165; d->specialty = "surgeon"; Person* w; w = d; } w main d p stack identifier heap

4. output struct Person { string name; int weight; }; struct Doctor : public Person { string specialty; }; int main() { Person* p = new Person; p->name = "George"; p->weight = 187; Doctor* d = new Doctor; d->name = "Sam"; d->weight = 165; d->specialty = "surgeon"; Person* w; w = d; } w George name main d 187 weight p stack identifier heap

5. output struct Person { string name; int weight; }; struct Doctor : public Person { string specialty; }; int main() { Person* p = new Person; p->name = "George"; p->weight = 187; Doctor* d = new Doctor; d->name = "Sam"; d->weight = 165; d->specialty = "surgeon"; Person* w; w = d; } name Sam weight 165 specialty surgeon w George name main d 187 weight p stack identifier heap

6. output struct Person { string name; int weight; }; struct Doctor : public Person { string specialty; }; int main() { Person* p = new Person; p->name = "George"; p->weight = 187; Doctor* d = new Doctor; d->name = "Sam"; d->weight = 165; d->specialty = "surgeon"; Person* w; w = d; } name Sam weight 165 specialty surgeon w George name main d 187 weight p stack identifier heap

7. output w can only see members of Person. Even though specialty is there, w cannot see it. struct Person { string name; int weight; }; struct Doctor : public Person { string specialty; }; int main() { Person* p = new Person; p->name = "George"; p->weight = 187; Doctor* d = new Doctor; d->name = "Sam"; d->weight = 165; d->specialty = "surgeon"; Person* w; w = d; } name Sam weight 165 specialty surgeon w George name main d 187 weight p stack identifier heap

8. output Shading was for illustration, for an exam this is what you would draw. struct Person { string name; int weight; }; struct Doctor : public Person { string specialty; }; int main() { Person* p = new Person; p->name = "George"; p->weight = 187; Doctor* d = new Doctor; d->name = "Sam"; d->weight = 165; d->specialty = "surgeon"; Person* w; w = d; } name Sam weight 165 specialty surgeon w George name main d 187 weight p stack identifier heap