test.cpp

#include <iostream>
#include <vector>
#include <string>
#include <fstream>

std::vector<std::string> tokenise(std::string csvLine, char seperator)
{
    std::vector<std::string> tokens;
    signed int start, end;
    std::string token;
    start = csvLine.find_first_not_of(seperator, 0);
    do
    {
        end = csvLine.find_first_of(seperator, start);
        
        if (start == csvLine.length() || start == end) break; //nothing more to find

        if (end >= 0) token = csvLine.substr(start, end - start); //we found the seperator
        else token = csvLine.substr(start, csvLine.length() - start);

        tokens.push_back(token);

        start = end + 1;

    }while(end != std::string::npos);

    return tokens;
}

int main()
{
    // std::string s = "thing,thing1,thing2";
    // std::vector<std::string> tokens;

    // tokens = tokenise(s, ',');

    // for (std::string& t : tokens)
    // {
    //     std::cout << t << std::endl;
    // }

    std::ifstream csvFile{"20231224.csv"};
    std::string line;

    if (csvFile.is_open())
    {
        std::cout << "File open" << std::endl;
        std::vector<std::string> tokens;

        while (std::getline(csvFile, line))
        {
            std::cout << line << std::endl;
            tokens = tokenise(line, ',');

            if (tokens.size() != 5)
            {
                std::cout << "Bad line" << std::endl;
                continue;
            }
            //we have 5 tokens
            try
            {
                double price = std::stod(tokens[3]);
                double amount = std::stod(tokens[4]);
            }
            catch(const std::exception& e)
            {
                std::cerr << e.what() << '\n';
                continue;
            }
        }
        csvFile.close();
        
    }
    else
    {
        std::cout << "Could not open" << std::endl;
    }
    

    return 0;
}