C++/Vector/vector display — различия между версиями
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Текущая версия на 13:27, 25 мая 2010
Use for_each function to print all elements in a vector
<source lang="cpp">
/* The following code example is taken from the book
* "The C++ Standard Library - A Tutorial and Reference" * by Nicolai M. Josuttis, Addison-Wesley, 1999 * * (C) Copyright Nicolai M. Josuttis 1999. * Permission to copy, use, modify, sell and distribute this software * is granted provided this copyright notice appears in all copies. * This software is provided "as is" without express or implied * warranty, and with no claim as to its suitability for any purpose. */
- include <iostream>
- include <vector>
- include <algorithm>
using namespace std; // function that prints the passed argument void print (int elem) {
cout << elem << " ";
} int main() {
vector<int> coll; // insert elements from 1 to 9 for (int i=1; i<=9; ++i) { coll.push_back(i); } // print all elements for_each (coll.begin(), coll.end(), // range print); // operation cout << endl;
} /* 1 2 3 4 5 6 7 8 9
*/ </source>
Use std::copy to output the elements in a vector
<source lang="cpp">
- include <iostream>
using std::cout; using std::endl;
- include <vector> // vector class-template definition
- include <algorithm> // copy algorithm
- include <iterator> // ostream_iterator iterator
- include <stdexcept> // out_of_range exception
int main() {
int array[ 6 ] = { 1, 2, 3, 4, 5, 6 }; std::vector< int > integers( array, array + 6 ); std::ostream_iterator< int > output( cout, " " ); integers.push_back( 2 ); integers.push_back( 3 ); integers.push_back( 4 ); cout << "Vector integers contains: "; std::copy( integers.begin(), integers.end(), output ); return 0;
} /* Vector integers contains: 1 2 3 4 5 6 2 3 4
*/ </source>