//使用向量::插入函数来插入元素集的位置
#include <vector>
#include <iostream>

int main() {
	using namespace std;

	// Instantiate a vector with 4 elements, each initialized to 90
	vector<int> vecIntegers(4, 90);

	cout << "The initial contents of the vector are: ";

	vector<int>::iterator iElement;
	for (iElement = vecIntegers.begin()
	; iElement != vecIntegers.end(); ++iElement) {
		cout << *iElement << ' ';
	}

	cout << endl;

	// Insert 25 at the beginning
	vecIntegers.insert(vecIntegers.begin(), 25);

	cout << "The vector after inserting an element at the beginning: ";
	for (iElement = vecIntegers.begin()
	; iElement != vecIntegers.end(); ++iElement) {
		cout << *iElement << ' ';
	}

	cout << endl;

	// Insert 2 numbers of value 45 at the end
	vecIntegers.insert(vecIntegers.end(), 2, 45);

	cout << "The vector after inserting two elements at the end: ";
	for (iElement = vecIntegers.begin()
	; iElement != vecIntegers.end(); ++iElement) {
		cout << *iElement << ' ';
	}
	cout << endl;

	// Another vector containing 2 elements of value 30
	vector<int> vecAnother(2, 30);

	// Insert two elements from another container in position [1]
	vecIntegers.insert(vecIntegers.begin() + 1, vecAnother.begin(),
			vecAnother.end());

	cout << "The vector after inserting contents from another ";
	cout << "in the middle:" << endl;
	for (iElement = vecIntegers.begin()
	; iElement != vecIntegers.end(); ++iElement) {
		cout << *iElement << ' ';
	}

	return 0;
}