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