Invalid number of arguments! Usage: set_solver <puzzle_file>

[jhworth8]

Hello! Great work on this.
When I run the code in Visual Studio, the output is "Invalid number of arguments!
Usage: set_solver <puzzle_file>"

I am a beginner programmer and not sure why it is saying that because the code looks good. Thanks!

[abhijitvalluri]

You need to provide it an argument, namely a puzzle file for it to solve the problem.

The format of the puzzle file needs to be similar to this: https://github.com/abhijitvalluri/set-solver/blob/master/advanced1.txt

[jhworth8]

Thank you very much, and for the quick response. Would that mean changing the name of "puzzle" here?
int main (int argc, char* argv[]) {

if (argc != 2) {
    std::cerr << "Invalid number of arguments!\n"
              << "Usage: set_solver <puzzle_file>" << std::endl;
    return 1;
}

std::fstream puzzle(argv[1], std::ios::in);
if (!puzzle.is_open())  {
    std::cerr << "Unable to open puzzle file" << std::endl;
    return 2;
}

std::vector<Card> cards;
try {
    cards = getCardsFromInput(puzzle);
} catch(InputError& e) {
    std::cerr << "Error while reading input: " << e.what() << std::endl;
    return 3;
}

std::vector<Set> sets = getAllSets(cards);

for (size_t i = 0; i != sets.size(); ++i) {
    std::cout << "Set #" << i << " " << sets[i].toString() << std::endl;
}

return 0;

}

Sorry, I am a beginner. I enjoy learning, by doing.