vector::size
Returns the number of elements in the vector.
size_type size() const;
Return Value
The current length of the vector.
Example
// vector_size.cpp
// compile with: /EHsc
#include <vector>
#include <iostream>
int main( )
{
using namespace std;
vector <int> v1;
vector <int>::size_type i;
v1.push_back(1);
i = v1.size();
cout << "Vector length is " << i << "." << endl;
v1.push_back(2);
i = v1.size();
cout << "Vector length is now " << i << "." << endl;
}
Vector length is 1. Vector length is now 2.
Requirements
Header: <vector>
Namespace: std