Given a function which produces a random integer in the range 1 to 5 write a function which produces a random integer in the range 1 to 7?

Answer 1

import java.util.Random;

public class Test

{

static int rand7() {

int i;

int max;

i = 5 * rand5() + rand5();

max = 25;

while(i < max%7) {

i *= 5;

i += rand5();

max %= 7;

max *= 5;

}

return(i%7);

}

private static int rand5()

{

Random rand = new Random() ;

int min = 1;

int max = 5;

int randomNum = rand.nextInt(max - min + 1) + min;

return randomNum;

}

public static void main(String [] args)

{

System.out.println(rand7());

}

}