Complete Day 9 Part 2

09/09.c

@@ -10,6 +10,9 @@
 #define NUM_ARR_LEN         300
 #define NUM_DIFFS           300
 
+#define REVERSE_ARR         1
+
+
 bool all_zeroes(int *num_arr, int len)
 {
     int i = 0;
@@ -37,6 +40,18 @@ int parse_num(char *str)
     return isnegative ? -num : num;
 }
 
+void reverse_arr(int *num_arr, int len)
+{
+    int i = 0;
+    int temp;
+    for (i = 0; i < (len  / 2); i++)
+    {
+        temp = num_arr[i];
+        num_arr[i] = num_arr[len - i - 1];
+        num_arr[len - i - 1] = temp;
+    }
+}
+
 int parse_nums(char *str, int *num_arr)
 {
     int i = 0;
@@ -48,6 +63,19 @@ int parse_nums(char *str, int *num_arr)
         i++;
         while (ISDIGIT(*str) || *str == '-') str++;
     }
+
+
+#if (REVERSE_ARR)
+    int k = 0;
+    int temp;
+    for (k = 0; k < (i  / 2); k++)
+    {
+        temp = num_arr[k];
+        num_arr[k] = num_arr[i - k - 1];
+        num_arr[i - k - 1] = temp;
+    }
+#endif
+
     return i;
 }