multimap operator = in C++ STL
The multimap::operator= is a built in C++ STL which assigns new contents to the container, replacing its current content.
Syntax:
multimap1_name = multimap2_name
Parameters: The multimap on the left is the container in which the multimap on the right is to be assigned by destroying the elements of multimap1.
Return Value: This function does not return anything.
// C++ program for illustration of // multimap::operator= function #include <bits/stdc++.h> using namespace std; int main() { // initialize container multimap< int , int > mp, copymp; // insert elements in random order mp.insert({ 2, 30 }); mp.insert({ 1, 40 }); mp.insert({ 2, 60 }); mp.insert({ 2, 20 }); mp.insert({ 1, 50 }); mp.insert({ 4, 50 }); // = operator is used to copy map copymp = mp; // prints the elements cout << "\nThe multimap mp1 is : \n" ; cout << "KEY\tELEMENT\n" ; for ( auto itr = mp.begin(); itr != mp.end(); ++itr) { cout << itr->first << '\t' << itr->second << '\n' ; } cout << "\nThe multimap copymap is : \n" ; cout << "KEY\tELEMENT\n" ; for ( auto itr = copymp.begin(); itr != copymp.end(); ++itr) { cout << itr->first << '\t' << itr->second << '\n' ; } return 0; } |
Output:
The multimap mp1 is : KEY ELEMENT 1 40 1 50 2 30 2 60 2 20 4 50 The multimap copymap is : KEY ELEMENT 1 40 1 50 2 30 2 60 2 20 4 50
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