Add Monte Carlo
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5 changed files with 276 additions and 0 deletions
97
Vorbereitungen/Konto.java
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97
Vorbereitungen/Konto.java
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import java.util.Scanner;
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public class Konto {
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static double kontostand;
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static Scanner scanner;
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private static boolean isInt(String input) {
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try {
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Integer.parseInt(input);
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} catch (NumberFormatException nfe) {
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return false;
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}
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return true;
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}
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private static void showBalance() {
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System.out.printf("Kontostand: %f", kontostand);
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}
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private static void deposit() {
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System.out.printf("Bitte geben Sie an, wie viel Geld sie einzahlen möchten: ");
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String userInput;
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while (true) {
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userInput = scanner.nextLine();
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if (isInt(userInput)) {
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Double.parseDouble(userInput);
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break;
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} else {
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System.out.println("Bitte geben Sie eine ganze Zahl ein.");
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}
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}
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double cleanUserInput = Double.parseDouble(userInput);
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kontostand += cleanUserInput;
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}
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private static void withdraw() {
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System.out.printf("Bitte geben Sie ein, wie viel Sie abheben möchten: ");
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String userInput;
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while (true) {
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userInput = scanner.nextLine();
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if (isInt(userInput)) {
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Double.parseDouble(userInput);
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break;
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} else {
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System.out.println("Bitte geben Sie eine ganze Zahl ein.");
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}
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double cleanUserInput = Double.parseDouble(userInput);
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if (cleanUserInput > kontostand) {
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System.out.println("Der eingegebene Betrag ist größer als der Kontostand.");
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return;
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}
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kontostand -= cleanUserInput;
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}
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}
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private static void menu() {
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System.out.println("1. Kontostandanzeige");
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System.out.println("2. Einzahlung");
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System.out.println("3. Auszahlung");
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System.out.println("4. Verlassen");
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System.out.printf("Eingabe: ");
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String userInput;
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while (true) {
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userInput = scanner.nextLine();
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if (isInt(userInput)) {
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Integer.parseInt(userInput);
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break;
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} else {
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System.out.println("Bitte geben Sie eine ganze Zahl ein.");
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}
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}
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int cleanUserInput = Integer.parseInt(userInput);
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while (true) {
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switch (cleanUserInput) {
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case 1:
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showBalance();
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break;
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case 2:
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deposit();
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break;
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case 3:
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withdraw();
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break;
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case 4:
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System.out.println("Verlassen...");
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System.exit(0);
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}
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}
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}
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public static void main(String[] args) {
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kontostand = 0;
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scanner = new Scanner(System.in);
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menu();
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}
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}
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2
Vorbereitungen/MonteCarlo/manifest.txt
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2
Vorbereitungen/MonteCarlo/manifest.txt
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Main-Class: vorbereitungen.MonteCarlo.MonteCarlo
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package vorbereitungen.MonteCarlo;
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import java.util.Scanner;
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public class MonteCarlo {
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public static void main(String args[]) {
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Scanner scanner = new Scanner(System.in);
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System.out.println("Enter how many attempts you want to run:");
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String attempts = scanner.nextLine();
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try {
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int num_attempts = Integer.parseInt(attempts);
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} catch(NumberFormatException nfe) {
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System.out.println("Invalid input.");
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scanner.close();
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System.exit(1);
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return;
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}
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int num_attempts = Integer.parseInt(attempts);
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System.out.println("Enter how large the initial bankroll should be:");
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String bankroll = scanner.nextLine();
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try {
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int num_bankroll = Integer.parseInt(bankroll);
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} catch(NumberFormatException nfe) {
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System.out.println("Invalid input.");
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scanner.close();
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System.exit(1);
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return;
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}
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int num_bankroll = Integer.parseInt(bankroll);
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System.out.println("Enter the Betsize you want to use for this simulation:");
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String betsize = scanner.nextLine();
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try {
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int num_betsize = Integer.parseInt(betsize);
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} catch(NumberFormatException nfe) {
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System.out.println("Invalid input.");
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scanner.close();
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System.exit(1);
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return;
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}
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int num_betsize = Integer.parseInt(betsize);
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scanner.close();
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Simulation simulation = new Simulation(num_attempts, num_bankroll, num_betsize);
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simulation.run();
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}
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}
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package vorbereitungen.MonteCarlo;
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import java.util.concurrent.ThreadLocalRandom;
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public class Simulation{
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int max_attempts;
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int current_attempts;
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double starting_bankroll;
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double current_bankroll;
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double simulated_betsize;
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public Simulation(int max_atts, int bankroll, double betsize) {
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this.max_attempts = max_atts;
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this.current_attempts = 1;
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this.starting_bankroll = bankroll;
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this.current_bankroll = bankroll;
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this.simulated_betsize = betsize;
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}
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public static int roll() {
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return ThreadLocalRandom.current().nextInt(1, 8);
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}
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public static double calculate(int player_roll, int dealer_roll) {
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int diff = dealer_roll - player_roll;
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if (diff >= 1) {return 0;}
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else if (diff == 0) {return 1;}
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else if (diff == -6) {return 2;}
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else {return 1.5;}
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}
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public void handle() {
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if (this.simulated_betsize > this.current_bankroll) {
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System.out.println("|===Out of money===|");
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System.out.printf("|Attempts: %d |\n", this.current_attempts);
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System.out.println("===================|");
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System.exit(2137);
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}
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this.current_bankroll -= this.simulated_betsize;
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int player_roll = roll();
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int house_roll = roll();
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double mult = calculate(player_roll, house_roll);
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this.current_bankroll += this.simulated_betsize*mult;
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this.current_attempts++;
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}
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public void print_progress() {
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double bankroll_percentage = (this.current_bankroll/this.starting_bankroll)*100;
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double attempt_percentage = (this.current_attempts/this.max_attempts)*100;
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System.out.printf("\033[2J"); // Clear screen
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System.out.println("|===========|");
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System.out.printf("|Current Attempt: %d/%d|\n", this.current_attempts, this.max_attempts);
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System.out.printf("|Current Bankroll: %f|\n", this.current_bankroll);
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System.out.printf("|%f%% left of starting bankroll\n|", bankroll_percentage);
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System.out.printf("|%f%% done|", attempt_percentage);
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System.out.println("|===========|");
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}
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public void run(){
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for (int i = 0; i < max_attempts; i++) {
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handle();
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if (this.current_attempts % 7500 == 0 || this.current_attempts == 1) {
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print_progress();
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}
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}
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}
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}
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58
Vorbereitungen/SieveOfErathostenes.java
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58
Vorbereitungen/SieveOfErathostenes.java
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import java.util.Arrays;
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import java.util.Scanner;
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public class SieveOfErathostenes {
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private static void isValid(String input) {
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if (input == null) {System.exit(-1);}
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try {
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Integer.parseInt(input);
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} catch (NumberFormatException nfe) {
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System.out.println("Die eingegebene Zahl ist keine ganze Zahl");
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System.exit(-1);
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}
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int cleanInput = Integer.parseInt(input);
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if (cleanInput < 2 || cleanInput > 1000) {
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System.out.println("Die eingegebene Zahl muss mindestens 2 sein und höchstens 1000 sein.");
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System.exit(-1);
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}
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}
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private static void printArray(boolean[] arr) {
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for (int i = 0; i < arr.length; i++) {
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if (arr[i]) {
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System.out.printf("%d ", i + 2);
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}
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}
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System.out.printf("%n");
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}
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public static void main(String[] args) {
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//System.out.println("Sanity Check");
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Scanner input_scanner = new Scanner(System.in);
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System.out.println("Bitte gib eine Zahl ein. ");
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String user_input = input_scanner.nextLine();
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input_scanner.close();
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isValid(user_input);
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int clean_input = Integer.parseInt(user_input);
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boolean[] primes = new boolean[clean_input];
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Arrays.fill(primes, true);
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for (int i = 1; i < clean_input; i++) {
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if (i == 1) {continue;}
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if (primes[i]) {
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for (int j = 2; j < clean_input; j++) {
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int tmp = j*i;
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if (tmp > clean_input) {
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break;
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}
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primes[tmp - 2] = false;
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}
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}
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}
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primes[clean_input - 1] = false;
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printArray(primes);
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}
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}
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