deque::difference_type

提供两迭代器之间的差异引用同一 deque 中元素的类型。

typedef typename Allocator::difference_type difference_type;

备注

difference_type 还会说明作为元素的数量。两个指针之间的。

示例

// deque_diff_type.cpp
// compile with: /EHsc
#include <iostream>
#include <deque>
#include <algorithm>

int main( ) 
{
   using namespace std;

   deque <int> c1;
   deque <int>::iterator c1_Iter, c2_Iter;

   c1.push_back( 30 );
   c1.push_back( 20 );
   c1.push_back( 30 );
   c1.push_back( 10 );
   c1.push_back( 30 );
   c1.push_back( 20 );

   c1_Iter = c1.begin( );
   c2_Iter = c1.end( );

   deque <int>::difference_type df_typ1, df_typ2, df_typ3;

   df_typ1 = count( c1_Iter, c2_Iter, 10 );
   df_typ2 = count( c1_Iter, c2_Iter, 20 );
   df_typ3 = count( c1_Iter, c2_Iter, 30 );
   cout << "The number '10' is in c1 collection " << df_typ1 << " times.\n";
   cout << "The number '20' is in c1 collection " << df_typ2 << " times.\n";
   cout << "The number '30' is in c1 collection " << df_typ3 << " times.\n";
}

要求

标头: <deque>

命名空间: std

请参见

参考

deque 类

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