added day 2 task 2

2/main.cpp

@@ -1,11 +1,15 @@
 #include <cstdio>
 #include <fstream>
 #include <iostream>
+#include <stdexcept>
 #include <string>
 
 constexpr char ROCK = 1;
 constexpr char PAPER = 2;
 constexpr char SCISSORS = 3;
+constexpr char LOSS = 1;
+constexpr char DRAW = 2;
+constexpr char WIN = 3;
 
 inline int get_result(const char& myChoice, const char& opponentChoice) {
     if (myChoice == SCISSORS and opponentChoice == ROCK) { return 0; }
@@ -15,21 +19,31 @@ inline int get_result(const char& myChoice, const char& opponentChoice) {
     return 0;
 }
 
+inline char get_choice_for_result(const char& result, const int& opponentChoice) {
+    if (result == DRAW) { return opponentChoice; }
+    else if (result == WIN) { return opponentChoice < 3 ? opponentChoice + 1 : 1; }
+    else if (result == LOSS) { return opponentChoice > 1 ? opponentChoice - 1 : 3; }
+    throw std::runtime_error("Reached end of get_choice_for_result");
+}
+
 int main() {
-    int score = 0;
+    int score_1 = 0;
+    int score_2 = 0;
     auto is = std::ifstream("scores.txt");
     std::string line;
     if (is.is_open()) {
         for (std::string line; std::getline(is, line); ) {
             char other = line.at(0) + 1 - 'A'; // convert to 1,2,3;
             char mine = line.at(2) + 1 - 'X'; // convert to 1,2,3
-            score += mine + get_result(mine, other);
+            score_1 += mine + get_result(mine, other);
+            score_2 += (mine - 1) * 3 + get_choice_for_result(mine, other);
         }
     }
     else {
         std::cerr << "Could not open file scores.txt" << std::endl;
         return 1;
     }
-    std::cout << "My score is " << score << std::endl;
+    std::cout << "If XYZ is Rock/Paper/Scissors, my score is " << score_1 << std::endl;
+    std::cout << "If XYZ is Loss/Draw/Win, my score is " << score_2 << std::endl;
     return 0;
 }