stack::empty

Tests if a stack is empty.

bool empty( ) const;

Return Value

true if the stack is empty; false if the stack is nonempty.

Example

// stack_empty.cpp
// compile with: /EHsc
#include <stack>
#include <iostream>

int main( )
{
   using namespace std;
   // Declares stacks with default deque base container
   stack <int> s1, s2;

   s1.push( 1 );

   if ( s1.empty( ) )
      cout << "The stack s1 is empty." << endl;
   else
      cout << "The stack s1 is not empty." << endl;

   if ( s2.empty( ) )
      cout << "The stack s2 is empty." << endl;
   else
      cout << "The stack s2 is not empty." << endl;
}

The stack s1 is not empty. The stack s2 is empty.

Requirements

Header: <stack>

Namespace: std

See Also

Reference

stack Class

stack::top and stack::empty

Standard Template Library

Other Resources

stack Members