C++ <string> - swap() Function
The C++ <string> swap() function is used to exchange the content of one string with the content of another string. Please note that the size of two strings may differ.
Syntax
void swap (string& lhs, string& rhs);
void swap (string& lhs, string& rhs);
Parameters
lhs |
First string. |
rhs |
Second string. |
Return Value
None.
Time Complexity
Constant i.e, Θ(1).
Example:
In the example below, the swap() function is used to exchange the content of string str1 with the content of string str2.
#include <iostream>
#include <string>
using namespace std;
int main (){
string str1{"Hello"};
string str2{"World"};
cout<<"Before Swapping -"<<"\n";
cout<<"str1: "<<str1<<"\n";
cout<<"str2: "<<str2<<"\n\n";
swap(str1, str2);
cout<<"After Swapping - "<<"\n";
cout<<"str1: "<<str1<<"\n";
cout<<"str2: "<<str2;
return 0;
}
The output of the above code will be:
Before Swapping - str1: Hello str2: World After Swapping - str1: World str2: Hello
❮ C++ <string> Library
