Using for_each to Display the Contents of a Collection : for_each « STL Algorithms Non modifying sequence operations « C++ Tutorial

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

#include <algorithm>
#include <iostream>
#include <vector>
#include <string>

using namespace std;

template <typename elementType>
class DisplayCounter{
private:
    int m_nCount;

public:
    DisplayCounter (){
        m_nCount = 0;
    }
    void operator () (const elementType& element) {
        ++ m_nCount;
        cout << element << ' ';
    }
    int GetCount(){
        return m_nCount;
    }
};

int main (){
    vector <int> v;

    for (int nCount = 0; nCount < 10; ++ nCount)
        v.push_back (nCount);

    DisplayCounter<int> mIntResult = for_each ( v.begin (), v.end(), DisplayCounter<int> () );
    cout << mIntResult.GetCount () << endl;


    string str ("this is a test");
    cout << str << endl << endl;

    DisplayCounter<char> mCharResult = for_each (str.begin(), str.end(),DisplayCounter<char> () );

    cout << mCharResult.GetCount () << endl;

    return 0;
}