#include <string>
#include <iostream>
#include <vector>
//C++03
int main() {
    std::vector<int> a;
    a.push_back(1);
    a.push_back(2);
    a.push_back(3);
    a.push_back(4);
    for(std::vector<int>::iterator it = a.begin(); it != a.end(); ++it)
        std::cout << *it << std::endl;

    std::cin.get();
}

//C++11 with 'auto' keyword
int main() {
    std::vector<int> a;
    a.push_back(1);
    a.push_back(2);
    a.push_back(3);
    a.push_back(4);
    for(auto it = a.cbegin(); it != a.cend(); ++it)
        std::cout << *it << std::endl;

    std::cin.get();
}

//C++11 with range-based for loops.
 int main() {
    std::vector<int> a;
    a.push_back(1);
    a.push_back(2);
    a.push_back(3);
    a.push_back(4);
    for(int item : a)
        std::cout << item << std::endl;

    std::cin.get();
}

//C++11 with initializer lists (unsupported in VS2012)
 int main() {
    std::vector<int> a = {1,2,3,4};
    for(int item : a)
        std::cout << item << std::endl;

    std::cin.get();
}