Question

1.Make a class whose objects each represent a battery. The only attribute an object will have is the battery type (one letter). Also, the class has to include the following services for its objects:
determine if two batteries are equal
change battery type
get battery type
display battery information
2.Make a class whose objects each represent a box of batteries (use dynamic memory and draw the class diagram). Also, the class has to include the following services for its objects:
-show what's in the box
-get how many kinds of batteries are in the box
-determine if two boxes are equal
C++. 

Answer 1

Code :

#include <iostream>

using namespace std;

const int MAX_SIZE = 10;

class Battery

{

private:

char m_cBattryType;

public:

char getBattryType()

{

return m_cBattryType;

}

void setBatteryType(char cBatteryType)

{

m_cBattryType = cBatteryType;

}

void DisplayInfo()

{

cout << m_cBattryType << endl;

}

bool operator ==(Battery battery)

{

return m_cBattryType == battery.getBattryType();

}

Battery(char cBatteryType)

{

m_cBattryType = cBatteryType;

}

};

class BatteryBox

{

private:

Battery* m_batteryArr[MAX_SIZE];

int m_iCount;

public:

char getCount()

{

return m_iCount;

}

BatteryBox()

{

m_iCount = 0;

for (int i = 0; i < MAX_SIZE; i++)

m_batteryArr[i] = NULL;

}

void DisplayInfo()

{

for (int i = 0; i < m_iCount; i++)

{

m_batteryArr[i]->DisplayInfo();

cout << i << endl;

}

}

void AddBattery(Battery *b)

{

m_batteryArr[m_iCount++] = b;

}

bool operator ==(BatteryBox batteryBox)

{

if (this->m_iCount != batteryBox.getCount())

return false;

bool bResult = false;

for (int i = 0; i < m_iCount; i++)

{

bResult = (*this->m_batteryArr[i] == *batteryBox.m_batteryArr[i]);

if (bResult == false)

break;

}

return bResult;

}

~BatteryBox()

{

for (int i = 0; i < m_iCount; i++)

{

Battery *ptr = m_batteryArr[i];

if (ptr)

{

delete ptr;

ptr = NULL;

}

}

}

};

using namespace std;

int main()

{

Battery* b1 = new Battery('a');

Battery* b2 = new Battery('b');

Battery* b3 = new Battery('a');

Battery* b4 = new Battery('b');

cout << "Show battery b1 information ";

b1->DisplayInfo();

cout << endl;

cout << "Show battery b3 information ";

b3->DisplayInfo();

cout << endl;

if (*b1 == *b3)

{

cout << "batteries are same" << endl;;

}

else

{

cout << "batteries are different" << endl;

}

BatteryBox bx1;

BatteryBox bx2;

bx1.AddBattery(b1);

bx1.AddBattery(b2);

bx2.AddBattery(b1);

bx2.AddBattery(b2);

cout << "Show battery box bx1 information ";

bx1.DisplayInfo();

cout << endl;

cout << "Show battery box bx2 information ";

bx2.DisplayInfo();

cout << endl;

if (bx1 == bx2)

{

cout << "battery boxes are same" << endl;;

}

else

{

cout << "different" << endl;

}

}