multiset::swap() in C++ STL
Multisets are a type of associative containers similar to set, with an exception that multiple elements can have same values.
multiset::swap()
This function is used to exchange the contents of two multisets but the sets must be of same type, although sizes may differ.
Syntax :
multisetname1.swap(multisetname2) Parameters : The name of the multiset with which the contents have to be swapped. Result : All the elements of the 2 multiset are swapped.
Examples:
Input : multiset1 = {1, 2, 3, 4}
multiset2 = {5, 6, 7, 8}
multiset1.swap(multiset2);
Output : multiset1 = {5, 6, 7, 8}
multiset2 = {1, 2, 3, 4}
Input : multiset1 = {'a', 'b', 'c', 'd'}
multiset2 = {'w', 'x', 'y', 'z'}
multiset1.swap(multiset2);
Output : multiset1 = {'w', 'x', 'y', 'z'}
multiset2 = {'a', 'b', 'c', 'd'}
// INTEGER MULTISET EXAMPLE// CPP program to illustrate// Implementation of swap() function#include <bits/stdc++.h>using namespace std; int main(){ // Take any two multisets multiset<int> multiset1{ 1, 2, 3, 4 }; multiset<int> multiset2{ 5, 6, 7, 8 }; // Swap elements of multisets multiset1.swap(multiset2); // Print the first multi set cout << "multiset1 = "; for (auto it = multiset1.begin(); it != multiset1.end(); ++it) cout << ' ' << *it; // Print the second multiset cout << endl << "multiset2 = "; for (auto it = multiset2.begin(); it != multiset2.end(); ++it) cout << ' ' << *it; return 0;} |
Output:
multiset1 = 5 6 7 8 multiset2 = 1 2 3 4
// STRING MULTISET EXAMPLE// CPP program to illustrate// Implementation of swap() function#include <bits/stdc++.h>using namespace std; int main(){ // Take any two multisets multiset<string> multiset1{ "Geeksforgeeks" }; multiset<string> multiset2{ "Computer scince", "Portal" }; // Swap elements of multisets multiset1.swap(multiset2); // Print the first multi set cout << "multiset1 = "; for (auto it = multiset1.begin(); it != multiset1.end(); ++it) cout << ' ' << *it; // Print the second multiset cout << endl << "multiset2 = "; for (auto it = multiset2.begin(); it != multiset2.end(); ++it) cout << ' |
Output:
multiset1 = Computer science portal multiset2 = Geeksforgeeks
// CHARACTER MULTISET EXAMPLE// CPP program to illustrate// Implementation of swap() function#include <bits/stdc++.h>using namespace std; int main(){ // Take any two multisets multiset<char> multiset1{ 'A', 'B', 'C' }; multiset<char> multiset2{ 'G', 'H', 'I' }; // Swap elements of multisets multiset1.swap(multiset2); // Print the first multi set cout << "multiset1 = "; for (auto it = multiset1.begin(); it != multiset1.end(); ++it) cout << ' ' << *it; // Print the second multiset cout << endl << "multiset2 = "; for (auto it = multiset2.begin(); it != multiset2.end(); ++it) cout << ' ' << *it; re |
Output:
multiset1 = G H I multiset2 = A B C
Time complexity: Constant
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