#include <iostream>

#include <vector>

using namespace std;

/*

vector<T>::reserve is used to alloc memory

vector<T>::resize is reset the occpied memory pointer

*/

int main(int argc, char** argv) {

vector<int> test;

cout << "test size: " << test.size() << endl;

cout << "test cap: " << test.capacity() << endl;

test.reserve(10);

cout << "test size: " << test.size() << endl;

cout << "test cap: " << test.capacity() << endl;

test.push_back(10);

test.push_back(11);

cout << "test size: " << test.size() << endl;

cout << "test cap: " << test.capacity() << endl;

test.resize(6);

test.push_back(66);

cout << "test size: " << test.size() << endl;

cout << "test cap: " << test.capacity() << endl;

return 0;

}