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 :
Example
s1.swap(s2)
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
Example
#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:
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.