void swap ( string& lhs, string& rhs); |
<string> |
Swap contents of two strings
Swaps the contents of the string objects lhs and rhs, such that after the call to this function, the contents of rhs are those which were in lhs before the call, and the contents of lhs are those which were in rhs.
Notice that string objects implement a member function also called swap; In fact, this global function effectively calls:
Parameters
- lhs
- a string object to be swapped.
- rhs
- the other string object to be swapped.
Return value
none
Example
// swap strings
#include <iostream>
#include <string>
using namespace std;
main ()
{
string buyer ("money");
string seller ("goods");
cout << "Before swap, buyer has " << buyer;
cout << " and seller has " << seller << endl;
swap (buyer,seller);
cout << " After swap, buyer has " << buyer;
cout << " and seller has " << seller << endl;
return 0;
}
|
Output:
Before swap, buyer has money and seller has goods
After swap, buyer has goods and seller has money |
Basic template declaration
template<class charT, chass traits, class Allocator>
void swap ( basic_string<charT,traits,Allocator>& lhs,
basic_string<charT,traits,Allocator>& rhs);
|
See also
| string::swap | Swap contents with another string (public member function) |
