AdventOfCode2022/src/days/02/Day02.cpp

#include "Day02.h"

int Day02::getScore(char opponent, char me) {
	int outcome;
	if (opponent == me)
		outcome = 3;
	else if (opponent == me + 1 || opponent == me - 2)
		outcome = 0;
	else
		outcome = 6;
	return outcome + me - 64;
}

Result Day02::Task1() {
	int score = 0;
	for (string line: input) {
		char predict = line.at(0);
		char answer = char(line.at(2) - 23);
		score += getScore(predict, answer);
	}
	return to_string(score);
}

Result Day02::Task2() {
	int score = 0;
	for (string line: input) {
		char predict = line.at(0);
		char outcome = line.at(2);

		char answer;
		if (outcome == 'X') {
			if (predict > 'A') answer = char(predict - 1);
			else answer = 'C';
		}
		if (outcome == 'Y') {
			answer = predict;
		}
		if (outcome == 'Z') {
			if (predict < 'C') answer = char(predict + 1);
			else answer = 'A';
		}

		score += getScore(predict, answer);
	}
	return to_string(score);
}