01. Pointers and References - Homework C++

// TryParse.h

#include <sstream>

bool tryParse(const std::string& str, int& n)
{
    std::istringstream in(str);
    return !(in >> n).fail();
}

// Find.h

#include <vector>
#include <algorithm>

#include "Company.h"

inline Company* find(const std::vector<Company*>& companies, int id)
{
    auto it = std::find_if(companies.begin(), companies.end(), [id](Company* c) { return c->getId() == id; });
    if (it != companies.end())
        return *it;

    return nullptr;
}

// OrderedInserter.h

#include <vector>
#include <algorithm>

#include "Company.h"

class OrderedInserter
{
public:
    OrderedInserter(std::vector<const Company*>& v) : companies(v) {};
    void insert(const Company* c)
    {
        auto it = std::lower_bound(companies.begin(), companies.end(), c,
            [](const Company* a, const Company* b) { return a->getId() < b->getId(); });
        companies.insert(it, c);
    }

private:
    std::vector<const Company*>& companies;
};

// ProfitReport.h

#include <map>
#include <sstream>

#include "Company.h"
#include "ProfitCalculator.h"

std::string getProfitReport(const Company* first, const Company* last, const std::map<int, ProfitCalculator>& calc)
{
    std::ostringstream out;
    std::string newline;
    for (const Company* c = first; c <= last; c++)
    {
        auto calculator = const_cast<std::map<int, ProfitCalculator>&>(calc)[c->getId()];
        //auto calculator = calc.at(c->getId());
        //auto calculator = calc.find(c->getId())->second;
        out << newline << c->getName() << " = " << calculator.calculateProfit(*c);
        newline = "\n";
    }

    return out.str();
}

// CompanyMemoryUtils.h

#include "Company.h"

using byte = unsigned char;

std::vector<Company> readCompaniesFromMemory(const byte* ptr, int n)
{
    std::vector<Company> companies;
    for (size_t i = 0; i < n; i++)
    {
        int id = *ptr++;

        std::string name(reinterpret_cast<const char*>(ptr));
        //std::string name((char*)ptr);
        ptr += name.length() + 1;

        int empl = *ptr++;
        std::vector<std::pair<char, char>> employees;
        for (size_t i = 0; i < empl; i++)
        {
            char ch1 = *ptr++, ch2 = *ptr++;
            employees.push_back(std::make_pair(ch1,ch2));
        }

        Company comp(id, name, employees);
        companies.push_back(comp);
    }

    return companies;
}