day6 part 1 done

.gitignore

@@ -1 +1,5 @@
+*
+!*.*
+!*/
 .vscode
+*.csv

day6/day.cpp

@@ -0,0 +1,116 @@
+#include <fstream>
+#include <iostream>
+#include <vector>
+
+bool AreWeInBounds(int x, int y, std::vector<std::vector<char>> &map) {
+  if (x < 0 || y < 0) {
+    return false;
+  }
+  if (x >= map.size() || y >= map[x].size()) {
+    return false;
+  }
+  return true;
+}
+
+int conditional_operation(int a, int b, char op) {
+  switch (op) {
+  case '+':
+    return a + b;
+  case '-':
+    return a - b;
+  default:
+    return a;
+  }
+}
+
+int main() {
+  std::ifstream inputfile("input");
+  std::string input;
+
+  int res = 0;
+  if (!inputfile.is_open()) {
+    std::cerr << "Could not open the file" << std::endl;
+    return ENOENT;
+  }
+  std::string line;
+  std::vector<std::vector<char>> map;
+
+  while (std::getline(inputfile, line)) {
+    map.push_back(std::vector<char>(line.begin(), line.end()));
+  }
+  int posX;
+  int posY;
+  int direction;
+  /*
+    0: up
+    1: right
+    2: down
+    3: left
+  */
+
+  for (int i = 0; i < map.size(); i++) {
+    for (int j = 0; j < map[i].size(); j++) {
+      if (map[i][j] == '^') {
+        posX = i;
+        posY = j;
+        direction = 0;
+      }
+    }
+  }
+  char op_x;
+  char op_y;
+  while (true) {
+    map[posX][posY] = 'X';
+
+    switch (direction) {
+    case 0:
+      op_x = '-';
+      op_y = 'n';
+      break;
+    case 1:
+      op_x = 'n';
+      op_y = '+';
+      break;
+    case 2:
+      op_x = '+';
+      op_y = 'n';
+      break;
+    case 3:
+      op_x = 'n';
+      op_y = '-';
+      break;
+    default:
+      std::cerr << "How did we get here?" << std::endl;
+      exit(255);
+      break;
+    }
+    if (!AreWeInBounds(conditional_operation(posX, 1, op_x),
+                       conditional_operation(posY, 1, op_y), map)) {
+      break;
+    }
+
+    switch (map[conditional_operation(posX, 1, op_x)]
+               [conditional_operation(posY, 1, op_y)]) {
+    case '#':
+      direction++;
+      if (direction > 3) {
+        direction = 0;
+      }
+      break;
+    default:
+      posX = conditional_operation(posX, 1, op_x);
+      posY = conditional_operation(posY, 1, op_y);
+    }
+  }
+
+  for (int i = 0; i < map.size(); i++) {
+    for (int j = 0; j < map[i].size(); j++) {
+      if (map[i][j] == 'X') {
+        res++;
+      }
+      std::cout << map[i][j];
+    }
+    std::cout << std::endl;
+  }
+  std::cout << "\nRes: " << res << std::endl;
+}