How to print vector<int> to terminal in c++

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I am trying to print a vector of integers to the terminal using "cout", but I get an error message during compiling:

no match for 'operator<<' (operand types are 'std::basic_ostream' and 'std::vector') cout << "Disparity at points: " << disparityVector << endl;

The snippet of code looks like this:

vector<int> disparityVector;

for ( int i=0; i<drawPixels.size(); i++)    // Get disparity at each point of the drawn line
  disparityVector.push_back((int)disparityMapOutput.at<int16_t>(pos[i].y, pos[i].x));

cout << "Disparity at points: " << disparityVector << endl;

There is no error with assigning the values to the vector, only the "cout" part of the code is making errors


You'll need something like below, if you want to do it the way you've coded it.

template<class T>
inline std::ostream& operator<< (std::ostream& o, std::vector<T> const& v) {
  for (auto const& i : v)
    o << i << " ";
  return o;
}

How to print out the contents of a vector in C++?, Vectors may allocate some extra storage for the future growth of elements in the vector. Vector elements are stored in the contiguous memory. std::vector has a member type called size_type for this job: it is the type returned by the size method. // Path typedef'd to std::vector<char> for( Path::size_type i=0; i<path.size(); ++i) std::cout << path[i] << ' '; Why not just use this over the iterator solution?


For example, using ostream_iterator.

Sample from that page:

// ostream_iterator example
#include <iostream>     // std::cout
#include <iterator>     // std::ostream_iterator
#include <vector>       // std::vector
#include <algorithm>    // std::copy

int main () {
  std::vector<int> myvector;
  for (int i=1; i<10; ++i) myvector.push_back(i*10);

  std::ostream_iterator<int> out_it (std::cout,", ");
  std::copy ( myvector.begin(), myvector.end(), out_it );
  return 0;
}

How to print out the contents of a vector?, Purely to answer your question, you can use an iterator: std::vector<char> path; // for (std::vector<char>::const_iterator i = path.begin(); i != path.end(); ++i)  vector::end() function returns an iterator point to past-the-end element of the vector. We run a loop from the first element to the less than past-the-element and prints the vector elements. Note: To use vector, include <vector> header. C++ STL program to print all elements of a vector


std::ostream& operator<<(std::ostream& os, const vector<int>& v)
{
    std::ostream_iterator<int> _oit(cout, " ");
    std::copy(v.begin(), v.end(), _oit);
    return os;
}

Vector in C++ STL, How to input a comma separated string in C++?. Vector in C++ STL. Vectors are same as dynamic arrays with the  If there are black vector outlines in the illustration, they should be 100% black, without mixtures of other colors. The strokes thickness should not be less than 0.1 mm, and it is better to set 0.15 mm and above for them. A large area of the image covered with black color, on the contrary,


This error means that vector<T> has no operator<< implementation. You need to iterate over your vector and print each element:

for(int i = 0; i < disparityVector.size; i++) {
    cout << disparityVector[i];
}
cout << endl;

Output of a vector - C++ Forum, Moreover, I want to know how to print output of a vector. Why doesn't cout << vector<string>example << endl; fail to print out vectors? Is there  How to print a Vec? Ask Question Asked 4 years, 11 months ago. Active 1 year ago. If you know the type of the elements that the vector contains,


vector::size - C++ Reference, This is the number of actual objects held in the vector, which is not necessarily equal to its storage capacity. Parameters. none. Return Value. The number of  You can modify your code to print '%d, ' (note the position of the space) and then replace ', )' with ')' to avoid an excessive space. – Roman Shapovalov Feb 19 '13 at 8:12 seeing ,') ')'], ',)', ')')) in a code makes me shudder, the effort to tell which of those are in strings and which are part of the code is


Printing all elements of a vector using vector::begin() and vector::end , C++ STL | printing all elements of a vector: Here, we are going to learn how to print all elements of a vector using vector::begin() and  3. Using Iterator. The idea is to use the reverse iterators to print a vector. Since we're not modifying the contents of the vector inside the loop, consider using the const_reverse_iterator, returned by crbegin() and crend(). Before C++11, we can use rbegin() and rend() that returns the reverse_iterator.


Vectors vs. Bitmaps for Printing, The Difference between Vectors and Bitmaps. First off, we'll have a quick look at what exactly a vector file and a bitmap file are. When you print views and sheets, you can choose vector processing or raster processing. Specify the type of processing for a print job on the Print Setup dialog. Raster processing times depend on the dimensions of the view and on the amount of graphics. Vector processing times vary depending on the number of views processed and on view complexity.