Question

Implement the friend function to overload the stream insertion operator (<<) so that the value contained in the PlainBox object can be output using the << operator. The prototype is given in the header file. plainbox.h typedef double T; class PlainBox{ private: Titem; public: PlainBox(): PlainBox(const T& theltem): void setItem(const T& itemltem); T getitem() const; friend ostream& operator<<(ostream & out, const PlainBox & theBox); bool operator<(const PlainBox & theBox);

Answer 1

Answer:

C++ CODE:

// Overloaded operator << for PlainBox objects

ostream &operator<<(ostream &out, const PlainBox &theBox) {

    out << theBox.item;

    return out;

}

COMPLETE C++ PROGRAM TO DEMONSTRATE ABOVE FUNCTION:

#include <iostream>

using namespace std;

typedef double T;

class PlainBox {

   private:

    T item;

   public:

    PlainBox() {

    }

    PlainBox(const T &theitem) {

        item = theitem;

    }

    void setItem(const T &itemItem) {

        item = itemItem;

    }

    T getItem() const {

        return item;

    }

    friend ostream &operator<<(ostream &out, const PlainBox &theBox);

};

// Overloaded operator << for PlainBox objects

ostream &operator<<(ostream &out, const PlainBox &theBox) {

    out << theBox.item;

    return out;

}

int main() {

    PlainBox b(5);

    cout << b;

    return 0;

}

OUTPUT:

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