stack::size


public member function
size_type size ( ) const;

Return size

Returns the number of elements in the stack.

This member function effectively calls the member with the same name in the underlying container object.

Parameters

none

Return Value

The number of elements that conform the stack's container content.

Member type size_type is an unsigned integral type.

Example

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// stack::size
#include <iostream>
#include <stack>
using namespace std;

int main ()
{
  stack<int> myints;
  cout << "0. size: " << (int) myints.size() << endl;

  for (int i=0; i<5; i++) myints.push(i);
  cout << "1. size: " << (int) myints.size() << endl;

  myints.pop();
  cout << "2. size: " << (int) myints.size() << endl;

  return 0;
}


Output:
0. size: 0
1. size: 5
2. size: 4


Complexity

Constant.

See also

stack::empty Test whether container is empty (public member function)