C++ STL istream_iterator::istream_iterator code 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++ istream_iterator::istream_iterator  to construct either an end-of-stream iterator as the default istream_iterator or a istream_iterator initialized to the iterator's stream type from which it reads in C++ programming

To show: How to use the C++ istream_iterator to construct either an end-of-stream iterator as the default istream_iterator or a istream_iterator initialized to the iterator's stream type from which it reads in C++ programming

 

// C++ STL istream_iterator, istream_iterator

#include <iterator>

#include <vector>

#include <algorithm>

#include <iostream>

using namespace std;

 

int main(void)

{

// used in conjunction with copy() algorithm to put elements into a vector read from cin

vector<int> vec(5);

vector<int>::iterator Iter;

cout<<"Enter 5 integers separated by spaces & then a character e.g: '4 6 2 7 11 R': ";

istream_iterator<int> intvecread(cin);

 

// default constructor will test equal to end of stream for delimiting source range of vector

copy(intvecread, istream_iterator<int>(), vec.begin());

cin.clear();

cout<<"vec vector data: ";

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

cout<<*Iter<<" ";

cout<<endl;

return 0;

}

 

Output examples:

 

Enter 5 integers separated by spaces & then a character e.g: '4 6 2 7 11 R': 1 2 3 4 5 Y

vec vector data: 1 2 3 4 5

Press any key to continue . . .

 

 

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