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Home » Tip Bank » C++
Language: C++
Expertise: Intermediate
Dec 23, 1998

Examining how Many Elements a Container is Currently Holding

You can detect how many elements are currently stored in a container by calling the member function size():
 
vector <int> vi; //create a vector of int's
for (int i = o; i < 10; i++) //fill vector
{
  vi.push_back(i);
}
cout<< "vi currently holds"<< vi.size() <<" elements" << endl;
All STL containers provide this member function. Please note that size() returns the number of elements stored in the container, not the number of bytes.
Danny Kalev
 
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