basic_istream::swap() in C++ with Examples
The basic_ios::swap(x) is used swap all data members of the base class except for rdbuf(), and swaps the values of the gcount() counters between *this and x. This basic_ios::swap(x) function is a protected function. Below is the syntax and the header file for the same:
Header File:
#include<iostream>
Syntax:
void swap (basic_istream& x);
Parameter: It accepts the following parameter:
- x : It represents the another object with the same parameter.
Return Value: The method basic_istream::get() doesn’t return anything.
Below are the programs to demonstrate basic_istream::swap():
Program 1:
// C++ program to demonstrate // basic_istream::swap() #include <bits/stdc++.h> using namespace std; // Driver Code int main() { // Input String gfg1 istringstream gfg1( "Welcome" ); // Input String gfg2 istringstream gfg2( "Beginner" ); // swap function for swapping // both the strings swap(gfg1, gfg2); cout << gfg1.rdbuf() << " " << gfg2.rdbuf() << endl; return 0; } |
Output:
Beginner Welcome
Program 2:
// C++ program to demonstrate // basic_istream::swap() #include <bits/stdc++.h> using namespace std; // Driver Code int main() { // Input String gfg1 istringstream gfg1( "forBeginner" ); // Input String gfg2 istringstream gfg2( "Beginner" ); // swap function for swapping // both the strings gfg1.swap(gfg2); cout << gfg1.rdbuf() << " " << gfg2.rdbuf() << endl; return 0; } |
Output:
Beginner forBeginner
Reference: http://www.cplusplus.com/reference/istream/basic_istream/swap/