Remove particles from vector

remove_example.cpp

	
	// create some particles.
	for(int i = 0; i < 10; ++i) {
		Particle p;
		parts.push_back(p);
	}
	cout << "We have:" << parts.size() << " particles." << endl;
	
	// remove some
	vector<Particle>::iterator it = parts.begin();
	while(it != parts.end()) {
		Particle& p = *it;
		if(!p.alive) {
			it = parts.erase(it);
			cout << "die" << endl;
		}
		++it;
	}
	cout<< parts.size() << endl;