C: 2015 Day 3 part 1 done

2015/day03/day03.c

@@ -0,0 +1,71 @@
+#include <stdio.h>
+
+void part1() {
+  printf("Part 1\n");
+  char ch = getchar();
+  int visits[1000][1000];
+  for(int i = 0; i < 1000; i++) {
+    for(int j = 0; j < 1000; j++) {
+      visits[i][j] = 0;
+    }
+  }
+  int x = 0, y = 0, minx = 0, maxx = 0, miny = 0, maxy = 0;
+  int inc = 0;
+  printf("(%4d,%4d) (%4d:%4d,%4d:%4d)", x, y, minx, maxx, miny, maxy);
+  while(ch) {
+    visits[x+500][y+500]++;
+    if(ch == '\n') { break; }
+    switch(ch) {
+    case '>':
+      x++;
+      break;
+    case 'v':
+      y--;
+      break;
+    case '<':
+      x--;
+      break;
+    case '^':
+      y++;
+      break;
+    }
+    if(x > maxx) {
+      maxx = x;
+    }
+    if(x < minx) {
+      minx = x;
+    }
+    if(y > maxy) {
+      maxy = y;
+    }
+    if(y < miny) {
+      miny = y;
+    }
+    ch = getchar();
+  }
+  int result = 0;
+  for(int i = 0; i < 1000; i++) {
+    for(int j = 0; j < 1000; j++) {
+      if(visits[i][j] > 0) {
+        result++;
+      }
+    }
+  }
+  printf("%d houses\n", result);
+}
+
+void part2() {
+  printf("Part 2\n");
+}
+
+int main(int argc, char **argv) {
+  int doPart = 1;
+  if(argc > 1) { doPart = argv[1][0] - '0'; }
+  if(doPart == 1) {
+    part1();
+  } else {
+    part2();
+  }
+  return 0;
+}
+