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STUDENT NOTES · C & C++ WEEK 7 OF 8
Family Trees & the Toolbox 🏛️
Classes that inherit from classes — and the STL: C++'s legendary box of ready-made tools.
1Inheritance — Batman IS a Hero
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Chip: class Batman : public Hero — Batman gets everything Hero has, plus his own gadgets. Write the common stuff once, inherit it everywhere.
2virtual — each object answers as itself
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Professor Hoot: Through a Hero pointer, a virtual function calls the RIGHT override: Batman broods, Thor thunders. That's runtime polymorphism — the crown jewel of OOP.
3vector — the array that finally grows
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Bittu: push_back = Python's append. size() = len. C arrays with seatbelts AND stretch. Where were vectors in Week 3, you ask? Being earned.
4map & sort — dictionary and order, C++ style
5Quick quiz! 🧠
class Batman : public Hero means…
💡 Inheritance: the child class receives the parent's members and adds its own.
What makes vector better than a C array for growing data?
💡 Vectors grow on demand and know their size — the Week 3 pain, solved by the STL.
6Your mission 🚀
Mission 1: Build Animal → Dog/Cat with a virtual speak(). Make a Hero pointer zoo speak.
Mission 2: Read 5 marks into a vector with push_back, print the size and the max.
Mission 3: Build map<string,int> shirt numbers for 3 players, print Messi's.
Week 7 complete — the toolbox is yours! 🏛️
Final week: multithreading — and shipping your project.
Go to Week 8: The Final Boss →