Question

How to allocate, use and delete dynamic array in class in C++

Answer 1

#include <iostream>

using std::cout;
using std::endl;

class Test {
	int *cp, length;
public:
	Test(int _length)
	{
		cout << "Constructor" << endl;
		length = _length;
		cp = new int[length];
		for (int i = 0; i < length; i++) 
			cp[i] = i * 2;
	}
	~Test()
	{
		cout << "Destructor" << endl;
		delete[] cp;
		cp = NULL;
	}
	void print()
	{
		for (int i = 0; i < length; i++)
			cout << cp[i] << endl;
	}
};

int main()
{
	Test *p = new Test(4);

	p->print();

	delete p;

	return 0;
}


/*
run:

Constructor
0
2
4
6
Destructor

*/

 

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