public member function
<set>

std::multiset::clear

void clear();
void clear() noexcept;
Clear content
Removes all elements from the multiset container (which are destroyed), leaving the container with a size of 0.

Parameters

none

Return value

none

Example

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// multiset::clear
#include <iostream>
#include <set>

int main ()
{
  std::multiset<int> mymultiset;

  mymultiset.insert (11);
  mymultiset.insert (42);
  mymultiset.insert (11);

  std::cout << "mymultiset contains:";
  for (std::multiset<int>::iterator it=mymultiset.begin(); it!=mymultiset.end(); ++it)
    std::cout << ' ' << *it;
  std::cout << '\n';

  mymultiset.clear();
  mymultiset.insert (200);
  mymultiset.insert (100);

  std::cout << "mymultiset contains:";
  for (std::multiset<int>::iterator it=mymultiset.begin(); it!=mymultiset.end(); ++it)
    std::cout << ' ' << *it;

  std::cout << '\n';

  return 0;
}


Output:
mymultiset contains: 11 11 42
myset contains: 100 200

Complexity

Linear in size (destructions).

Iterator validity

All iterators, pointers and references related to this container are invalidated.

Data races

The container is modified.
All contained elements are modified.

Exception safety

No-throw guarantee: this member function never throws exceptions.

See also

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