C++ STL  iterator, operator+ add program example

 

Compiler: Visual C++ Express Edition 2005

Compiled on Platform: Windows XP Pro SP2

Header file: Standard

Additional project setting: Set project to be compiled as C++

Project -> your_project_name Properties -> Configuration Properties -> C/C++ -> Advanced -> Compiled As: Compiled as C++ Code (/TP)

Other info: none

To do: Using the C++ iterator, operator+ to add an offset to an iterator and returns a move_iterator or a reverse_iterator addressing the inserted element at the new offset position in C++ programming

To show: How to use the C++ iterator, operator+ to add an offset to an iterator and returns a move_iterator or a reverse_iterator addressing the inserted element at the new offset position in C++ programming

 

// C++ STL iterator, operator+

#include <iterator>

#include <vector>

#include <iostream>

using namespace std;

 

int main(void)

{

int i;

// vector container

vector<int> vec;

// vector iterator

vector<int>::iterator veciter;

 

// push/insert data

for(i = 10; i<=15; ++i)

vec.push_back(i);

 

// print the data

cout<<"The vec vector data: ";

for(veciter = vec.begin(); veciter != vec.end(); veciter++)

cout<<*veciter<<" ";

cout<<endl;

 

vector<int>::reverse_iterator rveciter1 = vec.rbegin();

cout<<"\nThe iterator rveciter1 initially points to the first element in the reversed sequence: "<<*rveciter1<<endl;

cout<<"\nOperation: rveciter1 = diff + rveciter1"<<endl;

vector<int>::difference_type diff = 4;

rveciter1 = diff + rveciter1;

cout<<"The iterator rveciter1 now points to the fifth element in the reversed sequence: "<<*rveciter1<<endl;

return 0;

}

 

Output examples:

 

The vec vector data: 10 11 12 13 14 15

The iterator rveciter1 initially points to the first element in the reversed sequence: 15

Operation: rveciter1 = diff + rveciter1

The iterator rveciter1 now points to the fifth element in the reversed sequence: 11

Press any key to continue . . .

 

 

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