swap (<string>)
Exchanges the arrays of characters of two strings.
template<class Traits, class Allocator>
void swap(
basic_string<CharType, Traits, Allocator>& _Left,
basic_string<CharType, Traits, Allocator>& _Right
);
Parameters
_Left
One string whose elements are to be swapped with those of another string._Right
The other string whose elements are to be swapped with the first string.
Remarks
The template function executes the specialized member function _Left.swap(_Right) for strings, which guarantees constant complexity.
Example
// string_swap.cpp
// compile with: /EHsc
#include <string>
#include <iostream>
int main( )
{
using namespace std;
// Declaring an object of type basic_string<char>
string s1 ( "Tweedledee" );
string s2 ( "Tweedledum" );
cout << "Before swapping string s1 and s2:" << endl;
cout << "The basic_string s1 = " << s1 << "." << endl;
cout << "The basic_string s2 = " << s2 << "." << endl;
swap ( s1 , s2 );
cout << "\nAfter swapping string s1 and s2:" << endl;
cout << "The basic_string s1 = " << s1 << "." << endl;
cout << "The basic_string s2 = " << s2 << "." << endl;
}
Before swapping string s1 and s2: The basic_string s1 = Tweedledee. The basic_string s2 = Tweedledum. After swapping string s1 and s2: The basic_string s1 = Tweedledum. The basic_string s2 = Tweedledee.
Requirements
Header: <string>
Namespace: std