From e2f6a5172655e5798f9d69d1845cf61dc489e656 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=B0=8F=E7=A4=92=20=E8=80=80=E5=B9=B3?= <ykoiso@atled.jp>
Date: Thu, 28 Jul 2022 11:07:13 +0900
Subject: [PATCH 1/2] =?UTF-8?q?B006=20=E3=83=80=E3=83=BC=E3=83=84=E3=82=B2?=
 =?UTF-8?q?=E3=83=BC=E3=83=A0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ykoiso/src/B006_Darts.java      | 68 +++++++++++++++++++++++++++++++++
 ykoiso/test/B006_DartsTest.java | 24 ++++++++++++
 2 files changed, 92 insertions(+)
 create mode 100644 ykoiso/src/B006_Darts.java
 create mode 100644 ykoiso/test/B006_DartsTest.java

diff --git a/ykoiso/src/B006_Darts.java b/ykoiso/src/B006_Darts.java
new file mode 100644
index 0000000..3732009
--- /dev/null
+++ b/ykoiso/src/B006_Darts.java
@@ -0,0 +1,68 @@
+import java.util.Scanner;
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+public class B006_Darts {
+    public static final double G = 9.8;
+
+    public static void main(String[] args) {
+        Scanner scan = new Scanner(System.in);
+        boolean isHit = false;
+        // 初期地点の高さ
+        final double originY = scan.nextInt();
+        // 初速
+        final double velosity = scan.nextInt();
+        // 角度
+        final double angle = scan.nextInt();
+        // 的までの距離
+        final double disatance = scan.nextInt();
+        // 的の高さ
+        final double targetY = scan.nextInt();
+        // 的の半径
+        final double targetRadius = scan.nextInt() / 2;
+        // 矢の最終地点の高さ
+        final double lastY = calcLandingPlace(originY, velosity, angle, disatance);
+        // 当たるかの判定
+        isHit = judgeHit(lastY, targetY, targetRadius);
+        showAnswer(isHit, lastY, targetY);
+        scan.close();
+    }
+
+    public static double calcLandingPlace(final double originY, final double velosity,
+            final double angle, final double disatance) {
+        // 度数で渡されるのでラジアン表記に直している
+        final double rad = Math.toRadians(angle);
+        final double child = G * Math.pow(disatance, 2);
+        final double mother = 2 * Math.pow(velosity, 2) * Math.pow(Math.cos(rad), 2);
+        final double lastY = originY + (disatance * Math.tan(rad)) - (child / mother);
+        return lastY;
+    }
+
+    // 当たるかの判定
+    // テスト用
+    public static boolean judgeHit(final double lastY, final double targetY,
+            final double targetRadius) {
+        // 的との誤差
+        final double errorAbsDistance = Math.abs(targetY - lastY);
+        if (errorAbsDistance <= targetRadius) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    public static void showAnswer(final boolean isHit, final double lastY, final double targetY) {
+        // 的との誤差
+        final double errorAbsDistance = Math.abs(targetY - lastY);
+        // 誤差、四捨五入用
+        BigDecimal errorDistance = new BigDecimal(errorAbsDistance);
+        errorDistance = errorDistance.setScale(1, RoundingMode.HALF_EVEN);
+        // 出力
+        if (isHit) {
+            System.out.print("Hit ");
+            System.out.println(errorDistance);
+        } else {
+            System.out.println("Miss");
+        }
+    }
+}
diff --git a/ykoiso/test/B006_DartsTest.java b/ykoiso/test/B006_DartsTest.java
new file mode 100644
index 0000000..7074a56
--- /dev/null
+++ b/ykoiso/test/B006_DartsTest.java
@@ -0,0 +1,24 @@
+import static org.junit.Assert.assertThat;
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.*;
+
+public class B006_DartsTest {
+    @Test
+    public void 的に当たると判断できる() {
+        B006_Darts cut = new B006_Darts();
+        final double lastY = cut.calcLandingPlace(10, 13, 45, 20);
+        final boolean actual = cut.judgeHit(lastY, 10, 10);
+        final boolean expected = true;
+        assertThat(actual, is(expected));
+    }
+
+    @Test
+    public void 的に当たらないと判断できる() {
+        B006_Darts cut = new B006_Darts();
+        final double lastY = cut.calcLandingPlace(10, 15, 45, 10);
+        final boolean actual = cut.judgeHit(lastY, 10, 5);
+        final boolean expected = false;
+        assertThat(actual, is(expected));
+    }
+}
-- 
GitLab


From 2ad26732c2a1bb3886c9f7476dfa468162110e1e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=B0=8F=E7=A4=92=20=E8=80=80=E5=B9=B3?= <ykoiso@atled.jp>
Date: Thu, 28 Jul 2022 16:26:56 +0900
Subject: [PATCH 2/2] =?UTF-8?q?B006=20=E3=83=80=E3=83=BC=E3=83=84=E3=82=B2?=
 =?UTF-8?q?=E3=83=BC=E3=83=A0=E4=BF=AE=E6=AD=A3?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ykoiso/src/B006_Darts.java | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/ykoiso/src/B006_Darts.java b/ykoiso/src/B006_Darts.java
index 3732009..d9b7cc0 100644
--- a/ykoiso/src/B006_Darts.java
+++ b/ykoiso/src/B006_Darts.java
@@ -7,7 +7,6 @@ public class B006_Darts {
 
     public static void main(String[] args) {
         Scanner scan = new Scanner(System.in);
-        boolean isHit = false;
         // 初期地点の高さ
         final double originY = scan.nextInt();
         // 初速
@@ -23,7 +22,7 @@ public class B006_Darts {
         // 矢の最終地点の高さ
         final double lastY = calcLandingPlace(originY, velosity, angle, disatance);
         // 当たるかの判定
-        isHit = judgeHit(lastY, targetY, targetRadius);
+        final boolean isHit = judgeHit(lastY, targetY, targetRadius);
         showAnswer(isHit, lastY, targetY);
         scan.close();
     }
@@ -55,8 +54,8 @@ public class B006_Darts {
         // 的との誤差
         final double errorAbsDistance = Math.abs(targetY - lastY);
         // 誤差、四捨五入用
-        BigDecimal errorDistance = new BigDecimal(errorAbsDistance);
-        errorDistance = errorDistance.setScale(1, RoundingMode.HALF_EVEN);
+        final BigDecimal errorDistance =
+                new BigDecimal(errorAbsDistance).setScale(1, RoundingMode.HALF_EVEN);
         // 出力
         if (isHit) {
             System.out.print("Hit ");
-- 
GitLab