Big Bang

1 files changed, 104 insertions, 0 deletions

diff --git a/Advent-of-Code-2021/AOC-2/aoc-2.c b/Advent-of-Code-2021/AOC-2/aoc-2.c
new file mode 100644
index 0000000..6c212b1
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-2/aoc-2.c
@@ -0,0 +1,104 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int pos = 0;
+int depth = 0;
+int aim = 0;
+
+void ParseInput(char *filepath)
+{
+  char ch;
+  FILE *fp;
+  fp = fopen(filepath, "r");
+
+  if (fp == NULL)
+  {
+    perror("Error while opening the file.\n");
+    exit(EXIT_FAILURE);
+  }
+
+  char command;
+  char char_x_val;
+  int current_type = 0; // 0 - command; 1 - skip; 2 - val
+  /* Part 1
+  while((ch= fgetc(fp)) != EOF)
+  {
+    if(ch == ' ')
+    {
+      current_type = 2;
+    }
+    else if(ch == '\n')
+    {
+      int x = atoi(&char_x_val);
+      switch(command)
+      {
+      case 'f':
+	pos += x;
+	break;
+      case 'd':
+	depth += x;
+	break;
+      case 'u':
+	depth -= x;
+      }
+
+      current_type = 0;
+    }
+    else if(current_type == 0)
+    {
+      command = ch;
+      current_type = 1;
+    }
+    else if(current_type == 2)
+    {
+      char_x_val = ch;
+    }
+  }
+  */
+
+  /* Part2 */
+   while((ch= fgetc(fp)) != EOF)
+  {
+    if(ch == ' ')
+    {
+      current_type = 2;
+    }
+    else if(ch == '\n')
+    {
+      int x = atoi(&char_x_val);
+      switch(command)
+      {
+      case 'f':
+	pos += x;
+	depth += aim * x;
+	break;
+      case 'd':
+	aim += x;
+	break;
+      case 'u':
+	aim -= x;
+      }
+
+      current_type = 0;
+    }
+    else if(current_type == 0)
+    {
+      command = ch;
+      current_type = 1;
+    }
+    else if(current_type == 2)
+    {
+      char_x_val = ch;
+    }
+  }
+  
+  fclose(fp);
+}
+
+int main(void)
+{
+  ParseInput("input-2.txt");
+  printf("pos: %d, depth: %d; product: %d", pos, depth, pos * depth);
+  return 0;
+}