Solution for Day 1 in C++

2025/Cpp/Day01/Day01.cpp

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+#include "AdventHelpers/AdventOfCodeSolution.h"
+
+#include <iostream>
+#include <cassert>
+#include <string>
+
+class Dial {
+public:
+	Dial(bool debug = false, int initialPosition = 50, int minPosition = 0, int maxPosition = 99)
+        : mDebug(debug)
+        , mPosition(initialPosition)
+		, mMinPosition(minPosition)
+        , mMaxPosition(maxPosition) 
+    {
+
+    }
+
+    // Returns number of times it passes 0
+    int TurnLeft(int amount) {
+        int clicksAtZero = 0;
+
+        if (mDebug) std::cout << "Turning left " << amount << " from " << mPosition;
+    
+        while (amount > 0) {
+            if (mPosition == 0) {
+                mPosition = mMaxPosition;
+            }
+            else {
+                mPosition--;
+				if (mPosition == 0) clicksAtZero++;
+            }
+            amount--;
+        }
+
+        assert(amount == 0);
+        if (mDebug) std::cout << " Ended at: " << mPosition << std::endl;
+
+        return clicksAtZero;
+	}
+
+    // Returns number of times it passes 0
+    int TurnRight(int amount) {
+        int clicksAtZero = 0;
+
+        if (mDebug) std::cout << "Turning right " << amount << " from " << mPosition;
+    
+        while (amount > 0) {
+            if (mPosition == mMaxPosition) {
+                mPosition = 0;
+                clicksAtZero++;
+            }
+            else {
+                mPosition++;
+            }
+            amount--;
+        }
+		assert(amount == 0);
+        if (mDebug) std::cout << " Ended at: " << mPosition << std::endl;
+
+        return clicksAtZero;
+    }
+
+    int GetPosition() const {
+        return mPosition;
+	}
+private:
+    const bool mDebug;
+    const int mMaxPosition;
+    const int mMinPosition;
+    int mPosition;
+};
+
+class Day01Solution : public AdventHelpers::AdventOfCodeSolution
+{
+public:
+    virtual std::string SolveProblem01(AdventHelpers::InputFileHelper& inputFile) override {
+        Dial dial;
+        int password = 0;
+
+		for (const auto& line : inputFile) {
+            assert(line.length() >= 2);
+			char direction = line[0];
+            int amount = std::stoi(line.substr(1));
+
+            if (direction == 'L') {
+                dial.TurnLeft(amount);
+            }
+            else if (direction == 'R') {
+                dial.TurnRight(amount);
+            }
+            else {
+                assert(false && "Invalid direction");
+			}
+
+            if (dial.GetPosition() == 0) {
+                password++;
+            }
+        }
+        return std::to_string(password);
+    }
+
+    virtual std::string SolveProblem02(AdventHelpers::InputFileHelper& inputFile) override {
+        Dial dial;
+        int clicksAtZero = 0;
+
+        for (const auto& line : inputFile) {
+            assert(line.length() >= 2);
+            char direction = line[0];
+            int amount = std::stoi(line.substr(1));
+
+            if (direction == 'L') {
+                clicksAtZero += dial.TurnLeft(amount);
+            }
+            else if (direction == 'R') {
+                clicksAtZero += dial.TurnRight(amount);
+            }
+            else {
+                assert(false && "Invalid direction");
+            }
+        }
+        return std::to_string(clicksAtZero);
+    }
+};
+
+int main()
+{
+	Day01Solution solution;
+	solution.SolveAll();
+}
+