Add -r option to man and readme and make reset option actually prompt. Remove hardcoded merge_goal value.

src/highscore.c

@@ -44,7 +44,34 @@ static const char* highscore_retrieve_file(void)
 void highscore_reset(void)
 {
     const char *hsfile = highscore_retrieve_file();
+    const size_t resp_length = 16;
+    char resp[resp_length];
 
+    printf("Are you sure you want to reset your scores? Y(es) or N(o)\n");
+
+    while (1) {
+        fgets(resp, resp_length, stdin);
+        const size_t sl = strlen(resp);
+        if (sl < resp_length)
+            resp[sl - 1] = '\0';
+
+        if (!strncmp(resp, "Yes", resp_length) ||
+            !strncmp(resp, "Y",   resp_length) ||
+            !strncmp(resp, "yes", resp_length) ||
+            !strncmp(resp, "y",   resp_length)  )
+            goto reset_scores;
+
+        else
+        if (!strncmp(resp, "No", resp_length) ||
+            !strncmp(resp, "N",  resp_length) ||
+            !strncmp(resp, "no", resp_length) ||
+            !strncmp(resp, "n",  resp_length)  )
+            return;
+
+        printf("Please enter Yes or No\n");
+    }
+
+reset_scores:;
     FILE *fd = fopen(hsfile, "w+");
     fprintf(fd, "%d", 0);
     fclose(fd);

src/merge.c

@@ -1,7 +1,6 @@
-#include "assert.h"
 #include "merge.h"
 
-#define MERGE_GOAL 11
+#define MERGE_GOAL (int)(sizeof(merge_values)/sizeof(merge_values[0]))
 
 const long merge_values[] = {
     0, 2, 4, 8, 16, 32, 64, 128, 256, 512,

src/merge.h

@@ -8,7 +8,7 @@
 /* This should return the value of a given index. 0 should default to 0 (empty) */
 long merge_value(const int v1);
 
-/* This should return the goal value */
+/* This should return the goal index value */
 long merge_goal(void);
 
 /* Return if a merge is possible between two indices */

src/merge_fib.c.nomk

@@ -1,11 +1,10 @@
-#include "assert.h"
 #include "merge.h"
 
-#define MERGE_GOAL 17
+#define MERGE_GOAL (int)(sizeof(merge_values)/sizeof(merge_values[0]))
 
 const long merge_values[] = {
-    0, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144,
-    233, 377, 610, 987, 1597, 2584
+    0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144,
+    233, 377, 610, 987, 1597
 };
 
 inline long merge_value(const int v1)