Unordered_multimap operator= in C++

The C++ function std::unordered_multimap::operator=() assigns new contents to the unordered_multimap by replacing old ones and modifies size if necessary.

Following is the declaration for std::unordered_multimap::operator=() function form std::unordered_map() header.

C++11 (Syntax)

unordered_multimap& operator=(const unordered_multimap& umm);

Parameters

umm - Another unordered_multimap object of same type.

Return Value

Returns this pointer.

Example Code

#include <iostream>
#include <unordered_map>
using namespace std;
int main(void) {
   unordered_multimap umm1 = {
      {'a', 1},
      {'b', 2},
      {'c', 3},
      {'d', 4},
      {'e', 5},
   };
   unordered_multimap umm2;
   umm2 = umm1;
   cout << "Unordered multimap contains following elements" << endl;
   for (auto it = umm2.begin(); it != umm2.end(); ++it)
   cout << it->first << " = " << it->second << endl;
   return 0;
}

Output

Unordered multimap contains following elements
e = 5
a = 1
b = 2
c = 3
d = 4