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copy
Copies a range starting with the first element
Key Facts
Gyroscopic Couple: The rate of change of angular momentum (= Moment of Inertia.
= Angular velocity
= Angular velocity of precession.
Blaise Pascal (1623-1662) was a French mathematician, physicist, inventor, writer and Catholic philosopher.
Leonhard Euler (1707-1783) was a pioneering Swiss mathematician and physicist.
Definition
The copy() algorithm is defined in the standard header <algorithm> and in the nonstandard backward-compatibility header <algo.h>.Interface
#include <algorithm> template < class InputIterator, class OutputIterator > OutputIterator copy( InputIterator first, InputIterator last, OutputIterator result );Parameters:
| Parameter | Description |
|---|---|
| first | An input iterator addressing the position of the first element in the source range |
| last | An input iterator addressing the position that is one past the final element in the source range |
| result | An output iterator addressing the position of the first element in the destination range |
References
Example:
Example - copy algorithm
Problem
This program illustrates the use of the STL copy() algorithm to copy integers from a vector to the standard output, using an output stream iterator.
Workings
#include <iostream> #include <vector> #include <algorithm> #include <iterator> using namespace std; int main() { int a[] = {10, 20, 30, 40, 50, 60, 70, 80, 90, 100}; vector<int> v(a, a+10); cout <<"\nHere are the contents of v, displayed in the ""usual" way:\n"; for (vector<int>::size_type i=0; i<v.size(); i++) cout <<v.at(i)<<" "; cout <<"\nAnd here they are again, displayed this time using " "\nthe copy algorithm and an output stream iterator:\n"; copy(v.begin(), v.end(), ostream_iterator<int>(cout, " ")); return 0; }
Solution
Output:
Here are the contents of v, displayed in the "usual" way:
10 20 30 40 50 60 70 80 90 100 And here they are again, displayed this time using
the copy algorithm and an output stream iterator:
10 20 30 40 50 60 70 80 90 100
10 20 30 40 50 60 70 80 90 100 And here they are again, displayed this time using
the copy algorithm and an output stream iterator:
10 20 30 40 50 60 70 80 90 100
References