swap (<string>)

交换一些两个字符串的字符。

template<class Traits, class Allocator>
   void swap(
      basic_string<CharType, Traits, Allocator>& _Left,
      basic_string<CharType, Traits, Allocator>& _Right
   );

参数

• _Left
  组件将交换与其他字符串的字符串。

• _Right
  组件将交换与第一个字符串的另一个字符串。

备注

模板函数执行专用的成员函数_Left。交换(_Right)字符串中，确保常数的复杂性。

示例

// 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;
}

要求

标头: <string>

命名空间: std