Playing with vector

main.cpp

#include <iostream>
#include <vector>

int main()
{
    std::vector<int> int_array;                  //array of integers, empty
    std::vector<double> double_array_1;          //array of doubles, empty
    std::vector<double> double_array_2(10);      //array of doubles, containing 10 elements initialized with 0.0
    std::vector<double> double_array_3(10, 2.5f);//array of doubles, containing 10 elements initialized with 2.5
    std::vector<double> double_array_4 {1.0, 2.0, 3.0, 4.0, 5.0}; //array initialized with some values

    for(auto x:double_array_1)                              //loop into an array, C++11 way
        std::cout << "Array Double 1: " << x << std::endl;

    std::cout << std::endl;

    for(auto x:double_array_2)
        std::cout << "Array Double 2: " << x << std::endl;

    std::cout << std::endl;

    for(auto x:double_array_3)
        std::cout << "Array Double 3: " << x << std::endl;

    std::cout << std::endl;

    for(auto x:double_array_4)
        std::cout << "Array Double 4: " << x << std::endl;

    std::cout << std::endl;

    //adding an element to int_array
    int_array.push_back(10000);
    std::cout << "int_array contains " << int_array.size() << " elements" << std::endl;

    //deleting an element from double_array_4
    double_array_4.pop_back();
    std::cout << "double_array_4 contains " << double_array_4.size() << " elements" << std::endl;

    std::cout << std::endl;
    //Which element is gone?
    for(auto i = 0; i < double_array_4.size(); i++)
        std::cout << "Array Double 4 (updated): " << double_array_4.at(i) << std::endl;

    std::cout << std::endl;
    //copy of a vector
    auto copy_vector = double_array_4;
    for(auto x:copy_vector)
        std::cout << "copy_vector: " << x << std::endl;

    return 0;
}