CppExerciseNoForLoopsAnswer9.md

 

 

 

 

 

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

 

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

 

 

 

 

 

Question #9: Product of std::vector<int>

 

Replace the for-loop. You will need:

• std::accumulate
• std::multiplies

 

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#include <vector> int Product(const std::vector<int>& v) {   const int sz = static_cast<int>(v.size());   int product = 1;   for (int i=0; i!=sz; ++i)   {     product*=v[i];   }   return product; }

 

 

 

 

 

Answer

 

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#include <algorithm> #include <numeric> #include <vector> int Product(const std::vector<int>& v) {   return std::accumulate(v.begin(),v.end(),1,std::multiplies<int>()); }