#include <iostream>
#include <string>
#include <algorithm>
#include <cstdlib>
#include <vector>
void print(std::vector <double> const &a)
{
   std::cout << "The vector elements are : ";

   for(size_t i=0; i < a.size(); i++)
      std::cout << a.at(i) << ' ';
}

int tutorial()
{
    std::vector<double> numbers;
    const double meter=1;
    const double inch=0.0254;
    const double centimeter=0.01;
    const double feet=0.3048;
    double number=0;
    std::string raw_number="";
    while(true)
    {
        number=0;
        std::cout << "Please enter a length and it's unit, like 12cm. Accepted units are m, cm, in, ft.\n";
        std::cin >> raw_number;
        if (raw_number=="|")
        {
            break;
        }
        if (raw_number.find("cm")!=std::string::npos)
        {
            number=std::stod(raw_number)*centimeter;
        }
        else if(raw_number.find("m")!=std::string::npos)
        {
            number=std::stod(raw_number)*meter;
        }
        else if(raw_number.find("in")!=std::string::npos)
        {
            number=std::stod(raw_number)*inch;
        }
        else if(raw_number.find("ft")!=std::string::npos)
        {
            number=std::stod(raw_number)*feet;
        }
        else
        {
            std::cout << "Accepted units are m,cm,in and ft, enter it like \"12cm\"\n";
        }
        numbers.push_back(number);
    }
    sort(numbers.begin(), numbers.end());
    print(numbers);
    return 0;
}
int main()
{
    tutorial();
    return 0;
}