#include <iostream>
#include <vector>
#include <fstream>
#include <string>
#include <ctype.h>

int main() {
	unsigned int num_students {0};
	unsigned int class_sum {0};
	std::string answers {""};
	unsigned int line_number {0};

	std::cout << "Student              Score" << std::endl;
	std::cout << "--------------------------" << std::endl;

	std::ifstream file;
	file.open("data/students.txt"); // pseudo path

	if (!file || !file.is_open()) {
		std::cerr << "Error: There was a problem opening the file." << std::endl;
		file.close();
		return -1;
	}

	std::string line;

	while(getline(file, line)) {
		if (std::all_of(begin(line), end(line), [](char c) { return std::isspace(c); })) continue;

		// Set the answers
		if (line_number == 0) {
			answers = line;
		}

		int student_grade {0};

		// If line is students answers
		if (line_number != 0 && line_number % 2 == 0) {
			for (int answer = 0; answer < answers.length(); answer++) {
				if (line[answer] == answers[answer]) {
					student_grade += 1;
				}
			}

			class_sum += student_grade;

			std::cout << student_grade << std::endl;

		} else if (line_number > 0) {
			// Line is students name
			std::cout << line << std::string(23 - line.length(), ' ');
			num_students += 1;
		}

		line_number += 1;
		student_grade = 0;
	}

	file.close();

	std::cout << "\n--------------------------" << std::endl;

	std::cout << "Average score " << "         " << (class_sum / num_students) << std::endl;

	return 0;
}