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//Exercises Section 13.2 //Exercise 13.22: Assume that we want HasPtr to behave like a value.That //is, each object should have its own copy of the string to which the objects //point.We’ll show the d

//Exercises Section 13.3 //Exercise 13.29: Explain why the calls to swap inside swap(HasPtr&, //HasPtr&) do not cause a recursion loop. //For the swap inside function feed the library swap. //Exercis

//Exercises Section 13.4 //Exercise 13.33: Why is the parameter to the save and remove members //of Message a Folder&? Why didn’t we define that parameter as Folder? //Or const Folder&? //Because it h

#include #include #include using namespace std; class StrVec { public: StrVec() : elements(nullptr), first_free(nullptr), cap(nullptr) { } StrVec(const StrVec &); StrVec &operator=(const StrVe

/*class Sales_data { public: Sales_data(const Sales_data&); private: string bookNo; int units_sold = 0; double revenue = 0.0; }; Sales_data::Sales_data(const Sales_data&orig): bookNo(orig.bookNo