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main.cpp

#include <iostream> #include <type_traits> #include <vector> #include <string> #include <functional> #include <map> #include <algorithm> #include <sstream> #include <set> #include <unordered_map> using namespace std; class Car { public: Car(){} virtual void method1(){}; }; class Toyota : public Car { public: Toyota(){} void method1(){}; }; class Lada : public Car { public: Lada(){} void method1(); }; class User { public: //-----------vvvv---------------------->added this parameter User(Car& pCar):car(pCar){} //----------v-------------------------->make car a Car& Car &car; }; int main() { Toyota toyota; //-------------vvvvvv-------->pass as argument User user(toyota); }

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