find and display sorted v in lowest 20th percentile : find « STL Algorithms Non modifying sequence operations « C++

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C++ » STL Algorithms Non modifying sequence operations » findScreenshots 
find and display sorted v in lowest 20th percentile
  
#include <algorithm>
#include <iostream>
#include <iterator>
#include <vector>

using namespace std;

int main( )
{
   const int a[] 874952627,9};
   const int len = sizeof/ sizeofa[0] );

   const int percentile_20 = static_cast<int>0.2 * len );
   vector<int> va, a+len );

   copya, a+len, v.begin() );
   partial_sortv.begin(), v.begin()+percentile_20,v.end() );

   copyv.begin(), v.begin()+percentile_20,ostream_iterator<int>cout, " " ) );

}
  
    
  
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