Thread: question time (classes and pointers)

ok here is my following program:

#include <iostream>
using namespace std;

class Aircraft
{
private:
int range;
public:
Aircraft(int r) {range = r;}
~Aircraft() {cout << range << endl;}
};

class Airplane
{
private:
int length;
public:
Airplane(int l) {length = l;}
~Airplane() {cout << length << endl;}
};

class Helicopter
{
private:
int clearance;
public:
Helicopter(int c) {clearance = c;}
~Helicopter() {cout << clearance << endl;}
};

int main()
{
Aircraft carrier(5);
Airplane bowan(9);
Helicopter apache(15);

}

now the next thing that needs to be done is create a 5 element array of pointers to Aircraft. Then using the new operator, create dynamically 1 helicpoter, 3 Airplanes, and 1 Aircraft object. Than assign these objects to the elemtns of the array. Than in a loop delete each object...im assumign delete[] can work with that?

i understand id have to do
Aircraft *p[5];

but how would i go about intialising the new statements?
i tried p[5] = new helicopter;
but that just winds up giving me alot of errors

how can i go about doing this?

You need to inherit Airplane and helicopter from Aircraft -

class Airplane : public Aircraft
{
...
}

class Helicopter : public Aircraft
{
...
}

and then implement a vitual method or interface in Aircraft which is overrided in Airplane and Helicopter.

Then

p[5] = new helicopter;

would work if your array had six elements.