From efe6b2e06ba24308f3875580b540783f5f16b0c0 Mon Sep 17 00:00:00 2001
From: David Vazgenovich Shakaryan <dvshakaryan@gmail.com>
Date: Fri, 10 Jun 2022 14:28:43 -0700
Subject: test 95% within radius

---
 comp.c     |  2 +-
 comp.h     |  2 ++
 dartboat.c | 37 +++++++++++++++++++++++++++++++++++--
 3 files changed, 38 insertions(+), 3 deletions(-)

diff --git a/comp.c b/comp.c
index 3ce0c5e..46fb1ca 100644
--- a/comp.c
+++ b/comp.c
@@ -76,7 +76,7 @@ static struct ccoords gauss_offset()
 		.y = gauss(0, vertical_stdev) };
 }
 
-static struct pcoords throw_dart(struct pcoords target, struct ccoords *cc)
+struct pcoords throw_dart(struct pcoords target, struct ccoords *cc)
 {
 	struct ccoords tc = pol_to_cart(target);
 	struct ccoords offset = gauss_offset();
diff --git a/comp.h b/comp.h
index 009028f..cf53ffb 100644
--- a/comp.h
+++ b/comp.h
@@ -8,4 +8,6 @@ extern double horizontal_stdev, vertical_stdev;
 void comp_set_difficulty(int diff);
 void comp_visit(struct leg *l);
 
+struct pcoords throw_dart(struct pcoords target, struct ccoords *cc);
+
 #endif
diff --git a/dartboat.c b/dartboat.c
index 952b5b7..dcd523d 100644
--- a/dartboat.c
+++ b/dartboat.c
@@ -157,16 +157,49 @@ void test_averages()
 	}
 }
 
+int comp_95(const void *a, const void *b)
+{
+	if (*(double *)a > *(double *)b)
+		return 1;
+	if (*(double *)a < *(double *)b)
+		return -1;
+	return 0;
+}
+
+#define ROUNDS 1000000
+void test_95()
+{
+	for (int i = 8; i <= 88; i += 8) {
+		comp_set_difficulty(i);
+
+		struct ccoords cc;
+		struct pcoords target = {0, 0};
+
+		double dists[ROUNDS];
+		for (int i = 0; i < ROUNDS; ++i)
+			dists[i] = throw_dart(target, &cc).r;
+		qsort(dists, ROUNDS, sizeof(*dists), comp_95);
+
+		int index = (int)(ROUNDS * 0.95) - 1;
+
+		printf("%3d  %5.2f  %5.2f\n",
+			10 * (i/8 + 1),
+			horizontal_stdev,
+			dists[index]);
+	}
+}
+
 int main()
 {
 	srand(time(NULL));
 	init_board();
 
 	//cvc_curses_match(501);
-	pvc_curses_match(501);
+	//pvc_curses_match(501);
 	//pvp_curses_match(501);
-	test_match(501);
+	//test_match(501);
 	//test_averages();
+	test_95();
 
 	return 0;
 }
-- 
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