Declaration

bool vector<X,A>::empty() const;

Description

This is the empty() function for the vector class template.

Header Include

#include <vector>

Example

#include <iostream>
#include <vector>

int main()
{
	using namespace std;

	// Create a vector instance
	vector<char> qV;
	qV.push_back('X');
	qV.push_back('o');
	qV.push_back('a');
	qV.push_back('X');
	qV.push_back('.');
	qV.push_back('n');
	qV.push_back('e');
	qV.push_back('t');

	// Output the entries and check whether the vector is empty
	vector<char>::iterator qIter;
	cout << "V = ";
	for (qIter = qV.begin(); qIter != qV.end(); ++qIter) {
		cout << *qIter;
	}
	cout << endl;
	cout << "V" << (qV.empty() ? " is " : " is not ") << "empty." << endl;
	// Call clear
	cout << "call clear()" << endl;
	qV.clear();
	cout << "V = ";
	for (qIter = qV.begin(); qIter != qV.end(); ++qIter) {
		cout << *qIter;
	}
	cout << endl;
	cout << "V" << (qV.empty() ? " is " : " is not ") << "empty." << endl;

	// Keep the window open
	cin.get();
	return 0;
}

Output