C++: reading in from a text file

Question

I'm trying to figure out the best way to read in a .txt file, with comma separated information, line separated. Using that information, to create objects of my stock class.

.txt file looks like this:

    GOOGL, 938.85, 30
    APPL, 506.34, 80
    MISE, 68.00, 300

My stock class constructor is like stock(string symbol, double price, int numOfShares);

In my main program, I want to set up an input file stream that will read in the information and create objects of stock class, like so:

stock stock1("GOOGL", 938.85, 30);

stock stock2("APPL", 380.50, 60);

I assume I use ifstream and getline, but not quite sure how to set it up.

Thanks!

Answer 1

#include <fstream>
#include <string>
#include <sstream>

int main()
{
    //Open file
    std::ifstream file("C:\\Temp\\example.txt");

    //Read each line
    std::string line;
    while (std::getline(file, line))
    {
        std::stringstream ss(line);
        std::string symbol;
        std::string numstr;
        //Read each comma delimited string and convert to required type
        std::getline(ss, symbol, ',');
        std::getline(ss, numstr, ',');
        double price = std::stod(numstr);
        std::getline(ss, numstr, ',');
        int numOfShares = std::stoi(numstr);

        //Construct stock object with variables above
        stock mystock(symbol, price, numOfShares);
    }

    return 0;
}