(C++) Answer of exercise \#9: No for-loops \#20

January 11, 2018 · View on GitHub

 

 

 

 

 

(C++) Answer of exercise #9: No for-loops #20

 

This is the answer of Exercise #9: No for-loops.

 

 

 

 

Question: CountNonZeroPositives

 

Replace the for-loop. You will need:

 

#include <vector> int CountNonZeroPositives(const std::vector<int>& v) {   int sum = 0;   const size_t sz = v.size();   for (size_t i = 0; i!=sz; ++i)   {     if (v[i]>0) sum+=v[i];   } }

 

 

 

 

 

Answer

 

#include <algorithm #include <functional> #include <vector> //From http://www.richelbilderbeek.nl/CppCountNonZeroPositives.htm int CountNonZeroPositives(const std::vector<int>& v) {   return std::count_if(     v.begin(),     v.end(),     std::bind2nd(std::greater<int>(),0)); }