[C++ STL] vector (dynamic array) example

stl_vector_example.cpp

#include <iostream>
#include <vector>

void std_vector_test(){
	std::cout << "=== std::vector Test ===" << std::endl;	
	// 01. assignemnt
	std::vector<int> v1;
	v1.reserve(20);				// assign the memory space of 20 * int 
	std::vector<int> v2(2);		// assign the memory & fill 2*null(0)

	// 02. stack operation
	v1.push_back(1);
	v1.push_back(2);
	v1.push_back(3);
	v1.pop_back();
	v2.push_back(10);
	v2.push_back(20);

	// 03. access
	for(int i : v1)	std::cout << i << " ";	std::cout << std::endl;

	// 04. insert operation
	std::vector<int>::iterator li = v1.begin();
	v1.insert(li + 1, 4);
	v1.insert(li, v2.begin(), v2.end());
	for(int i : v1)	std::cout << i << " ";	std::cout << std::endl; 
	
	// 05. copy from array, vector
	int arr[] = {1,2,3,4};
	std::vector<int> v3(arr, arr + sizeof(arr)/sizeof(int));
	std::vector<int> v4(v3);
	for(int i : v3)	std::cout << i << " ";	std::cout << std::endl; 
	for(int i : v4)	std::cout << i << " ";	std::cout << std::endl;

	// 06. clear the data
	v1.clear();
	v2.clear();
	v3.clear();
	v4.clear();
}