swap (C++ STL <string>)
交換兩個字串的字元陣列。
template<class Traits, class Allocator> void swap( basic_string<CharType, Traits, Allocator>& _Left, basic_string<CharType, Traits, Allocator>& _Right );
參數
_Left
一個字串,其元素要與另一個字串的元素進行交換。_Right
另一個字串,其元素要與第一個字串交換。
備註
範本函式會為字串執行特殊的成員函式 _Left.swap(_Right),這可以保證常數的複雜性。
範例
// 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;
}
需求
標頭:<string>
命名空間: std