CurriculumOperator Overloading
Operator Overloading
<strong>Operator Overloading</strong> lets you define what operators do when applied to your custom classes. Makes code natural: v1 + v2 instead of v1.add(v2).
01Arithmetic Operators (+, -, *)
Overload + to add two objects naturally. As a member function, 'this' is the left operand.
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02Comparison Operators (==, !=, <)
Overload comparison operators to make objects work with if conditions and sorting algorithms.
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03Stream Operators (<< and >>)
Overloading << lets you print your object with std::cout directly. Must be a friend because left operand is std::ostream.
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04Increment/Decrement (++/--)
Prefix (++obj) and postfix (obj++) are different. C++ uses a dummy int parameter to distinguish the postfix version.
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05Subscript Operator ([])
Overloading [] lets your class act like an array. This is exactly how std::vector implements element access.
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std::string uses + for concatenation. std::vector uses [] for access. Your classes can feel just like built-in types.