vector2.cpp

/*

    size() – Returns the number of elements in the vector.
    max_size() – Returns the maximum number of elements that the vector can hold.
    capacity() – Returns the size of the storage space currently allocated to the vector expressed as number of elements.
    resize(n) – Resizes the container so that it contains ‘n’ elements.
    empty() – Returns whether the container is empty.
    shrink_to_fit() – Reduces the capacity of the container to fit its size and destroys all elements beyond the capacity.
    reserve() – Requests that the vector capacity be at least enough to contain n elements.

*/

// C++ program to illustrate the 
// capacity function in vector 
#include <iostream> 
#include <vector> 

using namespace std; 

int main() 
{ 
	vector<int> g1; 

	for (int i = 1; i <= 5; i++) 
		g1.push_back(i); 

	cout << "Size : " << g1.size(); 
	cout << "\nCapacity : " << g1.capacity(); 
	cout << "\nMax_Size : " << g1.max_size(); 

	// resizes the vector size to 4 
	g1.resize(4); 

	// prints the vector size after resize() 
	cout << "\nSize : " << g1.size(); 

	// checks if the vector is empty or not 
	if (g1.empty() == false) 
		cout << "\nVector is not empty"; 
	else
		cout << "\nVector is empty"; 

	// Shrinks the vector 
	g1.shrink_to_fit(); 
	cout << "\nVector elements are: "; 
	for (auto it = g1.begin(); it != g1.end(); it++) 
		cout << *it << " "; 

	return 0; 
} 

/*
All Vector Functions :

    vector::begin() and vector::end()
    vector rbegin() and rend()
    vector::cbegin() and vector::cend()
    vector::crend() and vector::crbegin()
    vector::assign()
    vector::at()
    vector::back()
    vector::capacity()
    vector::clear()
    vector::push_back()
    vector::pop_back()
    vector::empty()
    vector::erase()

    vector::size()
    vector::swap()
    vector::reserve()
    vector::resize()
    vector::shrink_to_fit()
    vector::operator=
    vector::operator[]
    vector::front()
    vector::data()
    vector::emplace_back()
    vector::emplace()
    vector::max_size()
    vector::insert()


*/