C++ Map Library - operator>= Function


Advertisements


Description

The C++ function std::multimap::operator>= tests whether first multimap is greater than or equal to other or not.

Operator >= compares element sequentially and comparison stops at first mismatch.

Declaration

Following is the declaration for std::multimap::operator>= function form std::map header.

C++98

template <class Key, class T, class Compare, class Alloc>
bool operator>= ( const multimap<Key,T,Compare,Alloc>& m1,
                  const multimap<Key,T,Compare,Alloc>& m2);

Parameters

  • m1 − First multimap object.

  • m2 − Second multimap object.

Return value

Returns true if first multimap is greater than or equal to second otherwise false.

Exceptions

No effect on container if exception is thrown.

Time complexity

Linear i.e. O(n)

Example

The following example shows the usage of std::multimap::operator>= function.

Live Demo
#include <iostream>
#include <map>

using namespace std;

int main(void) {
   /* Multimap with duplicates */
   multimap<char, int> m1;
   multimap<char, int> m2;

   m1.insert(pair<char, int>('a', 1));

   if (m1 >= m2)
      cout << "m1 multimap is greater than or equal to m2." << endl;

   m2.insert(pair<char, int>('a', 1));
   m2.insert(pair<char, int>('a', 1));

   if (!(m1 >= m2))
      cout << "m1 multimap is not greater than or equal to m2." << endl;

   return 0;
}

Let us compile and run the above program, this will produce the following result −

m1 multimap is greater than or equal to m2.
m1 multimap is not greater than or equal to m2.

map.htm

Advertisements