c++ std::copy to cout
The std::copy
function in C++ is used to copy a range of elements from one container to another. In this case, we want to copy the elements from a container to the standard output, which is represented by std::cout
.
Here are the steps involved in using std::copy
to copy elements to std::cout
:
Include the necessary header file:
#include <iostream>
is needed to usestd::cout
.Include the necessary namespace:
using namespace std;
allows us to usestd::cout
without specifying thestd
namespace every time.Create the source container: This could be an array, a vector, or any other container that holds the elements you want to copy.
Determine the range to be copied: Specify the beginning and ending iterators of the range of elements you want to copy. These iterators define the range as [beginning, end).
Use
std::copy
to copy the elements tostd::cout
: This is done by passing the beginning and ending iterators of the source container, along withstd::ostream_iterator
as the destination iterator. Thestd::ostream_iterator
is used to write the elements to the standard output.
Here is an example of how to use std::copy
to copy elements to std::cout
:
#include <iostream>
#include <algorithm>
#include <vector>
int main() {
using namespace std;
vector<int> source = {1, 2, 3, 4, 5};
std::copy(source.begin(), source.end(), std::ostream_iterator<int>(std::cout, " "));
return 0;
}
In this example, we include the necessary header files and the std
namespace. We create a vector called source
and populate it with some integers. Then, we use std::copy
to copy the elements of source
to std::cout
using std::ostream_iterator<int>(std::cout, " ")
as the destination iterator. The " "
parameter is used as the delimiter between the copied elements.
When we run this program, the output will be:
1 2 3 4 5
This means that the elements from the source
vector have been successfully copied to the standard output using std::copy
.