#include <iostream>
    #include <functional>
    #include <vector>
    #include <algorithm>
    #include <string>
    using namespace std;
    int main () 
    {
        vector <string*> num;
        num.push_back ( new string ("First") );
        num.push_back ( new string ("Second") );
        num.push_back ( new string ("Third") );
        num.push_back ( new string ("Fourth") );
        num.push_back ( new string ("Fifth") );
        vector <int> lengths ( num.size() );
        transform (num.begin(), num.end(), lengths.begin(), 
        mem_fun(&string :: length));
        for (int k = 0; k < 5; k++) 
        {
            cout << lengths[k]  << " ";
        }
        return 0;
    }

 #include <iostream> 
    #include <functional>
    #include <algorithm>
    using namespace std;
    int main () 
    {
        int num[] = {-12, -41, -15, -20, -10};
        transform ( num, num + 2, num, negate<int>() );
        for (int k = 0; k < 5; ++k)
            cout << num[k] << " ";
    }

#include <iostream>
    #include <functional>
    #include <algorithm>
    using namespace std;
    int main ()
    {
        int FirstData[] = {23, 33, 43, 52, 56};
        int SecondData[] = {2, 3, 4};
        int Res[6];
        transform ( FirstData, FirstData + 6, SecondData, Res, divides<int>());
        for (int k = 0; k < 5; k++)
        {
            cout << Res[k] << " ";
        }
        return 0;
    }