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);
}