// This program illustrates the use of copy constructors. C++

#include

#include

using namespace std;

class Inventory // class declaration with member functions defined in-line

{

private

char *description;

double price;

public:

Inventory() // default constructor

{ price = 0;

description = new char[6];

strcpy(description, "empty");

}

Inventory(char* d, double p) // constructor

{ description = new char[strlen(d) + 1]; // Get needed amount of memory

// to hold the description.

strcpy(description, d);

price = p;

}

~Inventory()

{ delete[] description; } // Use destructor to free the memory

// allocated for the dynamic variable.

const char* getDescription()

{ return description; }

double getPrice()

{ return price; }

void setDescription(char* d) // "Assumes" dynamic description

{ strcpy(description, d); // variable has enough memory to hold

} // the new string.

void setPrice(double p)

{ price = p; }

};

int main()

{ Inventory toolOne("screwdriver", 2.99);

// Fill in the code to create a new Inventory object named

// toolTwo that is initialized with the values of toolOne.

cout << fixed << setprecision(2) << showpoint;

cout << "toolOne: " << toolOne.getDescription() << " $"

<< toolOne.getPrice() << endl;

cout << "toolTwo: " << toolTwo.getDescription() << " $"

<< toolTwo.getPrice() << endl << endl;

// Fill in the code to change toolTwo's description to "electric screwdriver"

cout << "toolOne: " << toolOne.getDescription() << " $"

<< toolOne.getPrice() << endl;

cout << "toolTwo: " << toolTwo.getDescription() << " $"

<< toolTwo.getPrice() << endl << endl;

return 0;

}

Exercise 1: Fill in the code as indicated in bold type to complete program. Run and observe the

output.

Exercise 2: This may cause your program to abort on some systems. If it ran and produced output,

rather than aborting, explain why toolOnes description changed.

Exercise 3: Write a copy constructor, and place it in the Inventory declaration with the other

constructors. Rerun the program. Now, when toolTwos description is changed, toolOne should not

be affected.

Exercise 4: The setDescription member function, assumes there has been enough memory

allocated for the description to hold any new string being passed to it. This is not a safe assumption.

Rewrite the code in this function to free the current memory pointed to by the description pointer

and allocate the right amount of memory for the new string being passed to the function. Rerun your

program with the new function to make sure it still works correctly.