Simple string parsing with C++

Question

I\'ve been using C++ for quite a long time now but nevertheless I tend to fall back on scanf when I have to parse simple text files. For example given a config

Answer 1

This is a try using only standard C++.

Most of the time I use a combination of std::istringstream and std::getline (which can work to separate words) to get what I want. And if I can I make my config files look like:

foo=1,2,3,4

which makes it easy.

text file is like this:

foo=1,2,3,4
bar=0

---

And you parse it like this:

int main()
{
    std::ifstream file( "sample.txt" );

    std::string line;
    while( std::getline( file, line ) )   
    {
        std::istringstream iss( line );

        std::string result;
        if( std::getline( iss, result , '=') )
        {
            if( result == "foo" )
            {
                std::string token;
                while( std::getline( iss, token, ',' ) )
                {
                    std::cout << token << std::endl;
                }
            }
            if( result == "bar" )
            {
               //...
    }
}