Difference between revisions of "cpp/iterator/back inserter"
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#include <algorithm> | #include <algorithm> | ||
#include <iterator> | #include <iterator> | ||
| + | |||
int main() | int main() | ||
{ | { | ||
| − | std::vector<int> v{1,2,3,4,5,6,7,8,9,10}; | + | std::vector<int> v{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; |
std::fill_n(std::back_inserter(v), 3, -1); | std::fill_n(std::back_inserter(v), 3, -1); | ||
| − | for(int n : v) | + | for (int n : v) |
std::cout << n << ' '; | std::cout << n << ' '; | ||
} | } | ||
Revision as of 14:28, 30 December 2012
Template:ddcl list begin <tr class="t-dsc-header">
<td>Defined in header
</td>
<iterator>
<td></td> <td></td> </tr> <tr class="t-dcl ">
<td class="t-dcl-nopad">template< class Container >
std::back_insert_iterator<Container> back_inserter( Container& c);
</td>
std::back_insert_iterator<Container> back_inserter( Container& c);
<td class="t-dcl-nopad"> </td> <td class="t-dcl-nopad"> </td> </tr> Template:ddcl list end
back_inserter is a convenience function template that constructs a std::back_insert_iterator for the container c with the type deduced from the type of the argument.
Contents |
Parameters
| c | - | container that supports a push_back operation |
Return value
A std::back_insert_iterator which can be used to add elements to the end of the container c
Possible implementation
template< class Container > std::back_insert_iterator<Container> back_inserter( Container& c) { return std::back_insert_iterator<Container>(c); } |
Example
Run this code
#include <iostream> #include <vector> #include <algorithm> #include <iterator> int main() { std::vector<int> v{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; std::fill_n(std::back_inserter(v), 3, -1); for (int n : v) std::cout << n << ' '; }
Output:
1 2 3 4 5 6 7 8 9 10 -1 -1 -1
