(C++) Answer of exercise #9: No for-loops #0

 

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

 

 

 

 

 

Question

 

Replace the for-loop. You will need the following:

• std::for_each
• std::bind2nd
• std::multiplies

 

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#include <vector> void Triple(std::vector<int>& v) {   const int sz = v.size();   for (int i=0; i!=sz; ++i)   {     v[i]*=3;   } }

 

 

 

 

 

Answer

 

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#include <vector> #include <algorithm #include <numeric>   void Triple(std::vector<int>& v) {   std::transform(v.begin(),v.end(),v.begin(),     std::bind2nd(std::multiplies<int>(),3)); }