algo/create _vector.cpp at main · gaurav03kr/algo · GitHub

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#include <bits/stdc++.h>
#include <vector>
using namespace std;

int main()
{
	vector<int> v;

	v.assign(5, 10);

	cout << "The vector elements are: ";
	for (int i = 0; i < v.size(); i++)
		cout << v[i] << " ";

	v.push_back(15);
	int n = v.size();
	cout << "\nThe last element is: " << v[n - 1];

	v.pop_back();

	cout << "\nThe vector elements are: ";
	for (int i = 0; i < v.size(); i++)
		cout << v[i] << " ";

	v.insert(v.begin(), 5);

	cout << "\nThe first element is: " << v[0];

	v.erase(v.begin());

	cout << "\nThe first element is: " << v[0];

	v.emplace(v.begin(), 5);
	cout << "\nThe first element is: " << v[0];

	v.emplace_back(20);
	n = v.size();
	cout << "\nThe last element is: " << v[n - 1];

	v.clear();
	cout << "\nVector size after erase(): " << v.size();

	vector<int> v1, v2;
	v1.push_back(1);
	v1.push_back(2);
	v2.push_back(3);
	v2.push_back(4);

	cout << "\n\nVector 1: ";
	for (int i = 0; i < v1.size(); i++)
		cout << v1[i] << " ";

	cout << "\nVector 2: ";
	for (int i = 0; i < v2.size(); i++)
		cout << v2[i] << " ";

	v1.swap(v2);

	cout << "\nAfter Swap \nVector 1: ";
	for (int i = 0; i < v1.size(); i++)
		cout << v1[i] << " ";

	cout << "\nVector 2: ";
	for (int i = 0; i < v2.size(); i++)
		cout << v2[i] << " ";
}