誕生日のパラドックスとは、同じ部屋にいる 2 人が同じ誕生日である確率は、その部屋にいる人数 (n) の半分以上であり、23 を超えるというものです。このプロパティは実際にはパラドックスではありませんが、多くの人がそれを驚くべきと感じています。このパラドックスを、ランダムに生成された誕生日に関する一連の実験によってテストできる C++ プログラムを設計してください。. . , 100. n の値ごとに少なくとも 10 回の実験を実行する必要があり、n ごとに、その n の実験の数を出力して、そのテストで 2 人が同じ誕生日になるようにする必要があります。
package birth;
import java.util.Random;
/* Question:
The birthday paradox says that the probability that two people in a room
will have the same birthday is more than half as long as the number of
people in the room (n), is more than 23. This property is not really a paradox,
but many people find it surprising. Design a C++ program that can
test this paradox by a series of experiments on randomly generated birthdays,
which test this paradox for n =5, 10, 15, 20, . . . , 100. You should run
at least 10 experiments for each value of n and it should output, for each
n, the number of experiments for that n, such that two people in that test
have the same birthday.
*/
public class birth {
public static final int YEAR = 365;
public static void main(String[] args)
{
int numOfPeople = 5;
int people = 5;
//DOB array
int[] birthday = new int[YEAR];
//Creates an array that represents 365 days
for (int i = 0; i < birthday.length; i++)
birthday[i] = i + 1;
//Random Number generator
Random randNum = new Random();
int iteration = 1;
//iterates around peopleBirthday array
while (numOfPeople <= 100)
{
System.out.println("Iteration: " + iteration);
System.out.println();
//Creates array to holds peoples birthday
int[] peopleBirthday = new int[numOfPeople];
//Assigns people DOB to people in the room
for (int i = 0; i < peopleBirthday.length; i++)
{
int day = randNum.nextInt(YEAR + 1);
peopleBirthday[i] = birthday[day];
}
for (int i = 0; i < peopleBirthday.length; i++)
{
//stores value for element before and after
int person1 = peopleBirthday[i];
int person2 = i + 1;
//Checks if people have same birthday
for (int j = person2; j < peopleBirthday.length; j++)
{
//Prints matching Birthday days
if (person1 == peopleBirthday[j])
{
System.out.println("P1: " + person1 + " P2: " + peopleBirthday[j]);
System.out.println("Match!!! \n");
}
}
}
//Increments the number of people in the room
numOfPeople += 5;
iteration++;
}
}
}
エラーが発生しました:java.lang.ArrayIndexOutOfBoundsException: 365コードの何が問題なのかわかりません