C++ String swap() function

by Online Tutorials Library July 22, 2022

C++ String swap()

This function is used to exchange the values of two string objects.

Syntax

Consider two strings s1 and s2 , we want to exchange the values of these two string objects. Its syntax would be :

Parameters

It contains single parameter, whose value is to be exchanged with that of the string object.

Return value

It does not return any value.

Example 1

  #include<iostream>  using namespace std;  int  main()  {  string r = “10”;  string m = “20”  cout<<“Before  swap r contains ” << r <<“rupees”<<‘n’;  cout<<“Before  swap m contains ” << m <<“rupees”<<‘n’;  r.swap(m);   cout<< “After  swap r contains ” << r<<“rupees”<<‘n’;  cout<< “After  swap m contains ” << m<<“rupees”;  return 0;  }  

Output:

Before  swap  r  contains 10 rupees  Before  swap  m contains 20 rupees  After  swap r contains 20 rupees  After swap m contains 10 rupees

In this example, r and m are two string objects containing 10 and 20 rupees respectively. We swap there values by using swap function. After swapping, r contains 20 rupees and m contains 10 rupees.

Next TopicC++ Strings

C++ String swap() function

C++ String swap()

Syntax

Parameters

Return value

Example 1

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