why doesn't it work

day6/second.cpp

@@ -0,0 +1,158 @@
+#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("example");
+  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_orig;
+  int posY_orig;
+  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_orig = i;
+        posY_orig = j;
+        direction = 0;
+      }
+    }
+  }
+  char op_x;
+  char op_y;
+  std::vector<std::vector<char>> mapTmp;
+  std::vector<std::vector<char>> mapRes = map;
+  int posX;
+  int posY;
+  int counter;
+
+  for (int i = 0; i < map.size(); i++) {
+    for (int j = 0; j < map[i].size(); j++) {
+      if (map[i][j] == '^' || map[i][j] == '#') {
+        continue;
+      }
+
+      mapTmp.clear();
+      mapTmp = map;
+      mapTmp[i][j] = 'O';
+      posX = posX_orig;
+      posY = posY_orig;
+      counter = 0;
+
+      std::cout << "checking: " << i << " " << j << std::endl;
+      for (int i = 0; i < mapTmp.size(); i++) {
+        for (int j = 0; j < mapTmp[i].size(); j++) {
+          std::cout << mapTmp[i][j];
+        }
+        std::cout << "\n\n";
+      }
+
+      while (true) {
+        if (mapTmp[posX][posY] == 'X') {
+          counter++;
+        } else {
+          mapTmp[posX][posY] = 'X';
+          counter = 0;
+        }
+        if (counter > 200) {
+          res++;
+          mapRes[i][j] = 'O';
+          break;
+        }
+
+        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), mapTmp)) {
+          break;
+        }
+
+        switch (mapTmp[conditional_operation(posX, 1, op_x)]
+                      [conditional_operation(posY, 1, op_y)]) {
+        case '#':
+          direction++;
+          if (direction > 3) {
+            direction = 0;
+          }
+          break;
+        case 'O':
+          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 < mapRes.size(); i++) {
+    for (int j = 0; j < mapRes[i].size(); j++) {
+      std::cout << mapRes[i][j];
+    }
+    std::cout << std::endl;
+  }
+  std::cout << "\nRes: " << res << std::endl;
+}