Question

Consider the following header file for the intArray object and the following main.cpp and answer the following questions:

intArray.h

main.cpp

#include <iostream> using namespace std; class intArray { friend ostream& operator<<(ostream& outStream, intArray& rhs); public:     intArray();     intArray(int _size);     intArray(int _size, int array[]);     intArray(const intArray&);     ~intArray();     void Print();     void PrintSize();     int Size() const;     int operator[](int) const;     intArray operator=(const intArray ); private:     int size;     int *data; };

7 #include <iostream> 8 #include <cstdlib> 9 #include "intArray.h" 10 11 using namespace std; 12 13 /* 14 * 15 */ 16 int main(int argc, char** argv) { 17 18     intArray Array1(5, 1); 19     intArray Array2(5, 2); 20     intArray Array3; 21     22     Array3 = Array1 + Array2; 23     Array3 = Array1 + 5; 24     Array3 = 6 + Array1; 25     26     27     return 0; 28 }

Give the only prototype for the overloaded + operators as shown in lines 22, 23 and 24. Make sure all are cascade capable to allow the assignment to Array3.

Answer 1

Prototypes are written below alongwith the explanation. If you need any further clarification please feel free to ask in comments.

Line 22 Array3=Array1 +Array2;

Prototype:--->>> const intArray operator +( const intArray&);

Explain: As the assignment wants to add two intArray objects and return another intArray object, we need a overloaded function that returns intArray object and takes intArray object as parameter. The above operator overloaded function fullfills all the conditions for this assignemnt.

Line 23 Array3=Aray1 +5;

Prototype:---->>> const intArray operator +(const int);

Explain: As the assignment wants to add an intArray object and integer & return another intArray object, we need a overloaded function that returns intArray object and takes integer as parameter. The above operator overloaded function fullfills all the conditions for this assignemnt.

Line 24 Array3= 6 + Array1;

Prototype:---->>>> friend intArray operator +(const int, const intArray&);

Explain: As the assignment is done using integer as first argument and intArray object as second, We need a friend function which is operator overloaded in nature. A friend function which takes integer as first argument and intArray object as second parameter. The above friend operator overloaded function fullfills all the conditions for this assignemnt.