Use for_each with predicate : for_each « STL Algorithms Non modifying sequence operations « C++ Tutorial

1. C++ Tutorial
2. STL Algorithms Non modifying sequence operations
3. for_each

#include <iostream>
using std::cout;
using std::endl;

#include <algorithm>
#include <numeric>
#include <vector>
#include <iterator>

void outputSquare( int );

int main()
{
  std::ostream_iterator< int > output( cout, " " );

   int a2[ 10 ] = { 100, 2, 8, 1, 50, 3, 8, 8, 9, 10 };
   std::vector< int > v2( a2, a2 + 10 ); // copy of a2
   cout << "Vector v2 contains: ";
   std::copy( v2.begin(), v2.end(), output );

   // output square of every element in v
   cout << "\n\nThe square of every integer in Vector v is:\n";
   std::for_each( v2.begin(), v2.end(), outputSquare );

   cout << endl;
   return 0;
}
void outputSquare( int value )
{
   cout << value * value << ' ';
}

Vector v2 contains: 100 2 8 1 50 3 8 8 9 10

The square of every integer in Vector v is:
10000 4 64 1 2500 9 64 64 81 100