vector::difference_type
A type that provides the difference between two iterators that refer to elements within the same vector.
typedef typename Allocator::difference_type difference_type;
Remarks
A difference_type can also be described as the number of elements between two pointers, because a pointer to an element contains its address.
An iterator is more commonly used to access a vector element.
Example
// vector_diff_type.cpp
// compile with: /EHsc
#include <iostream>
#include <vector>
#include <algorithm>
int main( )
{
using namespace std;
vector <int> c1;
vector <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( );
vector <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";
}
The number '10' is in c1 collection 1 times.
The number '20' is in c1 collection 2 times.
The number '30' is in c1 collection 3 times.
Requirements
Header: <vector>
Namespace: std