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simplify handling of past successes

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jason
2022-01-04 23:49:31 -08:00
parent 98b4e94719
commit 8e98439f35
1 changed files with 72 additions and 74 deletions
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128
81_Splat/java/src/Splat.java
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@@ -1,14 +1,9 @@
import java.util.Arrays; import java.util.*;
import java.util.List;
import java.util.Random;
import java.util.Scanner;
public class Splat { public class Splat {
private static final Random random = new Random(); private static final Random random = new Random();
private final Scanner scanner = new Scanner(System.in); private final Scanner scanner = new Scanner(System.in);
private final float[] Arr = new float[42]; private final List<Float> pastSuccessfulJumpDistances = new ArrayList<>();
private int K = 0;
private int K1 = 0;
public static void main(String[] args) { public static void main(String[] args) {
new Splat().run(); new Splat().run();
@@ -17,7 +12,6 @@ public class Splat {
public void run() { public void run() {
showIntroduction(); showIntroduction();
Arrays.fill(Arr, 0.0f);
while (true) { while (true) {
InitialJumpConditions initial = buildInitialConditions(); InitialJumpConditions initial = buildInitialConditions();
@@ -45,59 +39,66 @@ public class Splat {
} }
private void showJumpResults(InitialJumpConditions initial, JumpResult jump) { private void showJumpResults(InitialJumpConditions initial, JumpResult jump) {
final float V = initial.getTerminalVelocity();
final float A = initial.getAcceleration();
if (jump.isSplat()) { if (jump.isSplat()) {
if (jump.hasReachedTerminalVelocity()) { showSplatMessage(initial, jump);
System.out.printf("%.2f SPLAT\n", (V / A) + ((initial.getAltitude() - (V * V / (2 * A))) / V)); showCleverSplatMessage();
} else { return;
System.out.printf("%.2f SPLAT\n", Math.sqrt(2 * initial.getAltitude() / A));
} }
showRandomSplatMessage();
} else {
System.out.println("CHUTE OPEN"); System.out.println("CHUTE OPEN");
int J = 0; int worseJumpCount = countWorseHistoricalJumps(jump);
for (J = 0; J < 42; J++) { pastSuccessfulJumpDistances.add(jump.getDistance());
if (Arr[J] == 0) { int successfulJumpCt = pastSuccessfulJumpDistances.size();
Arr[J] = jump.getDistance();
break; if (pastSuccessfulJumpDistances.size() <= 2) {
} List<String> ordinals = Arrays.asList("1ST", "2ND", "3RD");
K = K + 1; System.out.printf("AMAZING!!! NOT BAD FOR YOUR %s SUCCESSFUL JUMP!!!\n", ordinals.get(successfulJumpCt));
if (jump.getDistance() > Arr[J]) { return;
continue;
}
K1 = K1 + 1;
} }
if (J > 2) { int betterThanCount = successfulJumpCt - worseJumpCount;
if (K - K1 <= 0.1 * K) { if (betterThanCount <= 0.1 * successfulJumpCt) {
System.out.printf("WOW! THAT'S SOME JUMPING. OF THE %d SUCCESSFUL JUMPS\n", K); System.out.printf("WOW! THAT'S SOME JUMPING. OF THE %d SUCCESSFUL JUMPS\n", successfulJumpCt);
System.out.printf("BEFORE YOURS, ONLY %d OPENED THEIR CHUTES LOWER THAN\n", K - K1); System.out.printf("BEFORE YOURS, ONLY %d OPENED THEIR CHUTES LOWER THAN\n", betterThanCount);
System.out.println("YOU DID."); System.out.println("YOU DID.");
} else if (K - K1 <= 0.25 * K) { } else if (betterThanCount <= 0.25 * successfulJumpCt) {
System.out.printf("PRETTY GOOD! %d SUCCESSFUL JUMPS PRECEDED YOURS AND ONLY\n", K); System.out.printf("PRETTY GOOD! %d SUCCESSFUL JUMPS PRECEDED YOURS AND ONLY\n", successfulJumpCt);
System.out.printf("%d OF THEM GOT LOWER THAN YOU DID BEFORE THEIR CHUTES\n", K - K1); System.out.printf("%d OF THEM GOT LOWER THAN YOU DID BEFORE THEIR CHUTES\n", betterThanCount);
System.out.println("OPENED."); System.out.println("OPENED.");
} else if (K - K1 <= 0.5 * K) { } else if (betterThanCount <= 0.5 * successfulJumpCt) {
System.out.printf("NOT BAD. THERE HAVE BEEN %d SUCCESSFUL JUMPS BEFORE YOURS.\n", K); System.out.printf("NOT BAD. THERE HAVE BEEN %d SUCCESSFUL JUMPS BEFORE YOURS.\n", successfulJumpCt);
System.out.printf("YOU WERE BEATEN OUT BY %d OF THEM.\n", K - K1); System.out.printf("YOU WERE BEATEN OUT BY %d OF THEM.\n", betterThanCount);
} else if (K - K1 <= 0.75 * K) { } else if (betterThanCount <= 0.75 * successfulJumpCt) {
System.out.printf("CONSERVATIVE, AREN'T YOU? YOU RANKED ONLY %d IN THE\n", K - K1); System.out.printf("CONSERVATIVE, AREN'T YOU? YOU RANKED ONLY %d IN THE\n", betterThanCount);
System.out.printf("%d SUCCESSFUL JUMPS BEFORE YOURS.\n", K); System.out.printf("%d SUCCESSFUL JUMPS BEFORE YOURS.\n", successfulJumpCt);
} else if (K - K1 <= -0.9 * K) { } else if (betterThanCount <= -0.9 * successfulJumpCt) {
System.out.println("HUMPH! DON'T YOU HAVE ANY SPORTING BLOOD? THERE WERE"); System.out.println("HUMPH! DON'T YOU HAVE ANY SPORTING BLOOD? THERE WERE");
System.out.printf("%d SUCCESSFUL JUMPS BEFORE YOURS AND YOU CAME IN %d JUMPS\n", K, K1); System.out.printf("%d SUCCESSFUL JUMPS BEFORE YOURS AND YOU CAME IN %d JUMPS\n", successfulJumpCt, worseJumpCount);
System.out.println("BETTER THAN THE WORST. SHAPE UP!!!\n"); System.out.println("BETTER THAN THE WORST. SHAPE UP!!!\n");
} else { } else {
System.out.printf("HEY! YOU PULLED THE RIP CORD MUCH TOO SOON. %f SUCCESSFUL\n", K); System.out.printf("HEY! YOU PULLED THE RIP CORD MUCH TOO SOON. %d SUCCESSFUL\n", successfulJumpCt);
System.out.printf("JUMPS BEFORE YOURS AND YOU CAME IN NUMBER %d! GET WITH IT!\n", K - K1); System.out.printf("JUMPS BEFORE YOURS AND YOU CAME IN NUMBER %d! GET WITH IT!\n", betterThanCount);
}
} else {
String[] nums = new String[]{ "1ST", "2ND", "3RD"};
System.out.printf("AMAZING!!! NOT BAD FOR YOUR %s SUCCESSFUL JUMP!!!\n", nums[J]);
} }
} }
private void showSplatMessage(InitialJumpConditions initial, JumpResult jump) {
double timeOfSplat = computeTimeOfSplat(initial, jump);
System.out.printf("%10.2f SPLAT\n", timeOfSplat);
}
private double computeTimeOfSplat(InitialJumpConditions initial, JumpResult jump) {
final float V = initial.getTerminalVelocity();
final float A = initial.getAcceleration();
if (jump.hasReachedTerminalVelocity()) {
return (V / A) + ((initial.getAltitude() - (V * V / (2 * A))) / V);
}
return Math.sqrt(2 * initial.getAltitude() / A);
}
// Returns the number of jumps that this jump was better than
private int countWorseHistoricalJumps(JumpResult jump) {
return (int) pastSuccessfulJumpDistances.stream()
.filter(distance -> jump.getDistance() < distance)
.count();
} }
private JumpResult executeJump(InitialJumpConditions initial, float chuteOpenTime) { private JumpResult executeJump(InitialJumpConditions initial, float chuteOpenTime) {
@@ -131,13 +132,10 @@ public class Splat {
if (askYesNo("DO YOU WANT TO PLAY AGAIN ")) { if (askYesNo("DO YOU WANT TO PLAY AGAIN ")) {
return true; return true;
} }
if (askYesNo("PLEASE")) { return askYesNo("PLEASE");
return true;
}
return false;
} }
private void showRandomSplatMessage() { private void showCleverSplatMessage() {
List<String> messages = Arrays.asList( List<String> messages = Arrays.asList(
"REQUIESCAT IN PACE.", "REQUIESCAT IN PACE.",
"MAY THE ANGEL OF HEAVEN LEAD YOU INTO PARADISE.", "MAY THE ANGEL OF HEAVEN LEAD YOU INTO PARADISE.",
@@ -205,7 +203,7 @@ public class Splat {
private float chooseRandomAcceleration() { private float chooseRandomAcceleration() {
Planet planet = Planet.pickRandom(); Planet planet = Planet.pickRandom();
System.out.printf("%s. ACCELERATION=%.2f FT/SEC/SEC.\n", planet.getMessage(), planet.getAcceleration()); System.out.printf("%s %s. ACCELERATION=%.2f FT/SEC/SEC.\n", planet.getMessage(), planet.name(), planet.getAcceleration());
return planet.getAcceleration(); return planet.getAcceleration();
} }
@@ -293,16 +291,16 @@ public class Splat {
} }
enum Planet { enum Planet {
MERCURY("FINE. YOU'RE ON MERCURY", 12.2f), MERCURY("FINE. YOU'RE ON", 12.2f),
VENUS("ALL RIGHT. YOU'RE ON VENUS", 28.3f), VENUS("ALL RIGHT. YOU'RE ON", 28.3f),
EARTH("THEN YOU'RE ON EARTH", 32.16f), EARTH("THEN YOU'RE ON", 32.16f),
MOON("FINE. YOU'RE ON THE MOON", 5.15f), MOON("FINE. YOU'RE ON THE", 5.15f),
MARS("ALL RIGHT. YOU'RE ON MARS", 12.5f), MARS("ALL RIGHT. YOU'RE ON", 12.5f),
JUPITER("THEN YOU'RE ON JUPITER", 85.2f), JUPITER("THEN YOU'RE ON", 85.2f),
SATURN("FINE. YOU'RE ON SATURN", 37.6f), SATURN("FINE. YOU'RE ON", 37.6f),
URANUS("ALL RIGHT. YOU'RE ON URANUS", 33.8f), URANUS("ALL RIGHT. YOU'RE ON", 33.8f),
NEPTUNE("THEN YOU'RE ON NEPTUNE", 39.6f), NEPTUNE("THEN YOU'RE ON", 39.6f),
SUN("FINE. YOU'RE ON THE SUN", 896.0f); SUN("FINE. YOU'RE ON THE", 896.0f);
static final Random random = new Random(); static final Random random = new Random();
private final String message; private final String message;