Question

How to catch a memory allocation error in C++

Answer 1

#include <iostream>
#include <new>

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

#define SIZE 16

int main()
{
	int *p;

	try {
		p = new int[SIZE];
	}
	catch (std::bad_alloc &ba) {
		cout << "Allocation error: " << ba.what() << endl;
		return 1;
	}

	for (int i = 0; i < SIZE; i++)
		p[i] = i;

	for (int i = 0; i < SIZE; i++)
		cout << p[i] << " ";

	delete[] p;

	cout << endl;

	return 0;
}


/*
run:

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

*/

 

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Answer 2

#include <iostream>
#include <new>

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

int main()
{
	try {
		while (true) {
			new int[10000000];
		}
	}
	catch (std::bad_alloc &ba) {
		cout << "Allocation error: " << ba.what() << endl;
	}

	return 0;
}


/*
run:

Allocation error: bad allocation

*/

 

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