52 lines
1.9 KiB
Java
52 lines
1.9 KiB
Java
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/*
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This is java program to generate the random numbers. In mathematics, the middle-square method is a method of generating ‘pseudorandom’ numbers.To generate a sequence of 4-digit pseudorandom numbers, a 4-digit starting value is created and squared, producing an 8-digit number (if the result is less than 8 digits, leading zeroes are added to compensate). The middle 4 digits of the result would be the next number in the sequence, and returned as the result. This process is then repeated to generate more numbers.
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*/
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//This is a sample program to generate random numbers using the middle square method
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import java.util.Random;
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import java.util.Scanner;
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public class Middle_Suqare_Method
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{
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static int a[] = {1, 10, 100, 1000, 10000, 100000, 1000000, 10000000, 100000000};
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static int middleSquareNumber(int numb, int dig)
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{
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int sqn = numb*numb, next_num=0;
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int trim = (dig/2);
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sqn = sqn / a[trim];
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for(int i=0; i<dig; i++)
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{
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next_num += (sqn%(a[trim]))*(a[i]);
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sqn = sqn/10;
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}
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return next_num;
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}
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public static void main(String args[])
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{
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System.out.println("Enter the #-digit random numbers you want: ");
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Scanner sc = new Scanner(System.in);
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int n = sc.nextInt();
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int start=1, end=1;
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start = a[n-1];
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end = a[n];
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Random rand = new Random();
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int number = rand.nextInt(end-start)+start;
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System.out.print("The random numbers are:\n" +number+", ");
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int new_number=0;
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for(int i=0; i<9; i++)
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{
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number = Middle_Suqare_Method.middleSquareNumber(number, n);
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System.out.print(number+", ");
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}
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System.out.print("...");
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sc.close();
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}
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}
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/*
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Enter the #-digit random numbers you want:
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2
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The random numbers are:
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89, 92, 46, 11, 12, 14, 19, 36, 29, 84, ...
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