resizing.cpp

#include <vector>
#include <iostream>

using namespace std;

int main() {
	{
		size_t cap = 0;
		vector<int> v;
		for(int i = 0; i < 20; i++) {
			v.reserve(v.capacity() + 1);
			cap = v.capacity();
			cout << cap << endl;
		}
	}
	
	cout << endl;
	
	{
		size_t cap = 0;
		vector<int> v;
		for(int i = 0; i < 20; i++) {
			v.push_back(1);
			cap = v.capacity();
			cout << cap << endl;
		}
	}
	
	cout << endl;
	
	{
		size_t cap = 0;
		vector<int> v;
		for(int i = 0; i < 20; i++) {
			v.resize(v.size() + 1);
			cap = v.capacity();
			cout << cap << endl;
		}
	}
	
	return 0;
}