Add main.cpp for Advent of Code 2025 Day 1

Author: asmith-nhsx

aoc2025/day1/main.cpp

@@ -0,0 +1,117 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+#include <cmath>
+
+using namespace std;
+
+void debugOutput(const string& message, bool debugFlag = false) {
+    if (debugFlag) {
+        cout << message << endl;
+    }
+    return;
+}
+
+int getData(vector<string> &data, string fileName = "data.txt") {
+    ifstream file(fileName); // Open the file
+    string line;
+    data = {};
+    
+    if (!file.is_open()) { // Check if the file opened successfully
+        cerr << "Error opening the file!" << endl;
+        return 1;
+    }
+
+    while (getline(file, line)) { // Read each line
+        data.push_back(line);
+    }
+
+    file.close(); // Close the file
+    return 0;
+}
+
+int solution1(vector<string> &data, bool debugFlag = false) {
+    int dial = 50;
+    int start = dial;    
+    int incr = 0;
+    int result = 0;
+    
+    for (const auto& datum : data) {
+        incr = stoi(datum.substr(1));
+        if (datum[0] == 'L') {
+            dial -= incr;
+        }
+        else
+        {
+            dial += incr;
+        }
+        
+        if (dial < 0) {
+            dial = 100 + dial;
+        }
+
+        dial %= 100;
+        if (dial == 0) {
+            result++;
+        }
+        debugOutput(datum + " " + to_string(start) + " " + to_string(dial) + " " + to_string(result), debugFlag);
+        start = dial;
+    }
+    return result;
+}
+
+int solution2(vector<string> &data, bool debugFlag = false) {
+    int dial = 50;
+    int start = dial;
+    int incr = 0;
+    int result = 0;
+
+    for (const auto& datum : data) {
+        incr = stoi(datum.substr(1));
+        for (int i = 0; i < abs(incr); i++) {
+            if (datum[0] == 'L') {
+                dial--;
+            }
+            else
+            {
+                dial++;
+            }
+            if (dial > 99) {
+                dial = 0;
+            }
+            if (dial < 0) {
+                dial = 99;
+            }
+            if (dial == 0) {
+                result++;
+            }
+        }
+        debugOutput(datum + " " + to_string(start) + " " + to_string(dial) + " " + to_string(result), debugFlag);
+        start = dial;
+    }
+    return result;
+}
+
+int main()
+{
+    int result;
+    vector<string> data = {};
+    
+    cout << "AdventOfCode25 Day 1\n\n"; 
+    
+    if(getData(data) == 0) {
+        result = solution1(data, false);
+        cout << "The answer is " << result << endl;
+        
+        result = solution2(data, false);
+        cout << "The answer is " << result << endl;       
+    }
+
+    return 0;
+}
+
+
+
+
+