unordered_multiset::size

Counts the number of elements.

size_type size() const;

Remarks

The member function returns the length of the controlled sequence.

Example

 

// std_tr1__unordered_set__unordered_multiset_size.cpp 
// compile with: /EHsc 
#include <unordered_set> 
#include <iostream> 
 
typedef std::unordered_multiset<char> Myset; 
int main() 
    { 
    Myset c1; 
 
    c1.insert('a'); 
    c1.insert('b'); 
    c1.insert('c'); 
 
// display contents " [c] [b] [a]" 
    for (Myset::const_iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        std::cout << " [" << *it << "]"; 
    std::cout << std::endl; 
 
// clear the container and reinspect 
    c1.clear(); 
    std::cout << "size == " << c1.size() << std::endl; 
    std::cout << "empty() == " << std::boolalpha << c1.empty() << std::endl; 
    std::cout << std::endl; 
 
    c1.insert('d'); 
    c1.insert('e'); 
 
// display contents " [e] [d]" 
    for (Myset::const_iterator it = c1.begin(); 
        it != c1.end(); ++it) 
        std::cout << " [" << *it << "]"; 
    std::cout << std::endl; 
 
    std::cout << "size == " << c1.size() << std::endl; 
    std::cout << "empty() == " << std::boolalpha << c1.empty() << std::endl; 
 
    return (0); 
    } 
 
 [c] [b] [a]
size == 0
empty() == true

 [e] [d]
size == 2
empty() == false

Requirements

Header: <unordered_set>

Namespace: std

See Also

Reference

<unordered_set>

unordered_multiset Class

unordered_multiset::max_size