Coding

[Becky Miller]

I am trying to write a program that requires the program to select six different numbers from integers 1 to 49 and then generate five sets of entries.
so far I have :
public class Lottery{
public static void main(String [] args)
{


int number =0;
number = 1 +(int)(49 * Math.random());
System.out.println(number);

}
}
how do you select 6 random numbers from 1 to 49?
I really don't know where to go from here. Any help would be appreciated.

[ryan burgdorfer]

Becky,
Why not just generate all 6 numbers like you have done with "number" in your code?
int num1 = 1 + (int)( 49 * Math.random() );
int num2 = 1 + (int)( 49 * Math.random() );
int num3 = 1 + (int)( 49 * Math.random() );
int num4 = 1 + (int)( 49 * Math.random() );
int num5 = 1 + (int)( 49 * Math.random() );
int num6 = 1 + (int)( 49 * Math.random() );
And you could generate the entries the same way...(if by entries you mean what I think you mean)
~Ryan

[Pat Barrett]

Also, Don't forget to put a method in to check and see if the number has been used already. I would suggest putting all of the chosen numbers into an array, and then check the new number against the existing array elements. Something along the lines of...

    boolean numberUsed(int choice, int[]chosen, int numberCount)
    {
        for ( int i = 0 ; i < numberCount ; i++ )
        {
            if ( chosen[i] == choice )
            {
                return true ;
            }
        }
        return false ;
    }    

should be a start.
Pat B.

[Randall Twede]

If the numbers have to be unique I would do the same as Pat suggested.