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Get index from STL container iterator

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  1. // distance example
  2. #include <iostream>
  3. #include <iterator>
  4. #include <list>
  5. using namespace std;
  6.  
  7. int main () {
  8.   list<int> mylist;
  9.   for (int i=0; i<10; i++) mylist.push_back (i*10);
  10.  
  11.   list<int>::iterator first = mylist.begin();
  12.   list<int>::iterator last = mylist.end();
  13.  
  14.   cout << "The distance is: " << distance(first,last) << endl;
  15.  
  16.   return 0;
  17. }

URL: http://www.cplusplus.com/reference/std/iterator/distance/

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