(C++) Answer of exercise \#9: No for-loops \#17

January 11, 2018 · View on GitHub

 

 

 

 

 

(C++) Answer of exercise #9: No for-loops #17

 

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

 

 

 

 

 

Question #17: Halve

 

Replace the for-loop. You will need:

 

#include <vector> void Halve (std::vector<double>& v) {   const int sz = static_cast<int>(v.size());   for (int i=0; i!=sz; ++i)   {     v[i]/=2.0;   } }

 

 

 

 

 

Answer

 

#include <algorithm> #include <numeric> #include <vector> //From http://www.richelbilderbeek.nl/CppHalve.htm void Halve (std::vector<double>& v) {   std::transform(v.begin(),v.end(),v.begin(),     std::bind2nd(std::divides<double>(),2.0)); }