rotate
若要在兩個相鄰的範圍的項目。
template<class ForwardIterator>
void rotate(
ForwardIterator _First,
ForwardIterator _Middle,
ForwardIterator _Last
);
參數
_First
處理順向 Iterator 的第一個項目的位置在範圍會旋轉。_Middle
定義在處理第一個項目位置範圍中的第二個部分中項目將切換與該範圍內的第一部分之範圍內的順向 Iterator 界限。_ Last
處理順向的 Iterator 超過最後一個項目的位置是在範圍會旋轉。
備註
範圍的參考必須是有效的,任何指標必須 dereferenceable,並在序列中最後一個位置開始可取得的會增加。
複雜度是線性與最多_Last (–) _First交換。
範例
// alg_rotate.cpp
// compile with: /EHsc
#include <vector>
#include <deque>
#include <algorithm>
#include <iostream>
int main( ) {
using namespace std;
vector <int> v1;
deque <int> d1;
vector <int>::iterator v1Iter1;
deque<int>::iterator d1Iter1;
int i;
for ( i = -3 ; i <= 5 ; i++ )
{
v1.push_back( i );
}
int ii;
for ( ii =0 ; ii <= 5 ; ii++ )
{
d1.push_back( ii );
}
cout << "Vector v1 is ( " ;
for ( v1Iter1 = v1.begin( ) ; v1Iter1 != v1.end( ) ;v1Iter1 ++ )
cout << *v1Iter1 << " ";
cout << ")." << endl;
rotate ( v1.begin ( ) , v1.begin ( ) + 3 , v1.end ( ) );
cout << "After rotating, vector v1 is ( " ;
for ( v1Iter1 = v1.begin( ) ; v1Iter1 != v1.end( ) ;v1Iter1 ++ )
cout << *v1Iter1 << " ";
cout << ")." << endl;
cout << "The original deque d1 is ( " ;
for ( d1Iter1 = d1.begin( ) ; d1Iter1 != d1.end( ) ;d1Iter1 ++ )
cout << *d1Iter1 << " ";
cout << ")." << endl;
int iii = 1;
while ( iii <= d1.end ( ) - d1.begin ( ) ) {
rotate ( d1.begin ( ) , d1.begin ( ) + 1 , d1.end ( ) );
cout << "After the rotation of a single deque element to the back,\n d1 is ( " ;
for ( d1Iter1 = d1.begin( ) ; d1Iter1 != d1.end( ) ;d1Iter1 ++ )
cout << *d1Iter1 << " ";
cout << ")." << endl;
iii++;
}
}
需求
標題: <algorithm>
命名空間: std