I always forget how to read files with numbers in c++.

read_file.cpp

void read_file(std::string filename) {
    // open file
    std::ifstream infile(filename);

    // check if opened succesfull
    if (!infile) std::cout << "Failed to open file." << std::endl;

    // read line by line and save in temporary string "line"
    std::string line;
    while(infile) {
        getline(infile, line);
        // the last line is an empty string apparantly
        if (line != "") {
            // use stringstream object to parse a single line
            std::stringstream ss(line);
            std::string temp;
            std::cout << "reading a line" << std::endl;
            while (getline(ss, temp, ',')) {
                // convert to float and print
                std::cout << stof(temp) << std::endl;
            }
        }
    }
    // file is closed when infile goes out of scope
}