std::vector code snippet to write every element in a std::vector to std::cout. There is also a more general solution for every container: CoutContainer. To be also able to read the std::vector, go to write and read a std::vector to/from a std::stream.

Instead of using a for-loop (See question 15 of Exercise #9: No for-loops), the algorithm std::copy can be used to copy the contents of a std::vector to std::cout using the std::ostream_iterator. Prefer algorithms over loops [1][2].


#include <vector>

#include <iterator>

#include <iostream>

#include <ostream>



//From http://www.richelbilderbeek.nl/CppCoutVector.htm

template <class T>

void CoutVector(const std::vector<T>& v)

{

  std::copy(v.begin(),v.end(),std::ostream_iterator<T>(std::cout,"\n"));

}

CoutVector test


#include <vector>

#include <iterator>

#include <iostream>

#include <ostream>



//From http://www.richelbilderbeek.nl/CppCoutVector.htm

template <class T>

void CoutVector(const std::vector<T>& v)

{

  std::copy(v.begin(),v.end(),std::ostream_iterator<T>(std::cout,"\n"));

}



int main()

{

  //Create a vector

  std::vector<int> v;

  v.push_back(1);

  v.push_back(4);

  v.push_back(9);

  v.push_back(16);

  v.push_back(25);



  //Show it on screen using CoutVector

  CoutVector(v);

}

References

Bjarne Stroustrup. The C++ Programming Language (3rd edition). ISBN: 0-201-88954-4. Chapter 18.12.1 : 'Prefer algorithms over loops'
Herb Sutter and Andrei Alexandrescu. C++ coding standards: 101 rules, guidelines, and best practices. ISBN: 0-32-111358-6. Chapter 84: 'Prefer algorithm calls to handwritten loops.'

Go back to Richel Bilderbeek's C++ page.

Go back to Richel Bilderbeek's homepage.

(C++) CoutVector

CoutVector test

References