Pascal - Help - 5 Random numbers, not repeated?

Hi, ive been trying to make a simple program, and for the past few days its been getting the better of me.rolleyes

user presses [ENTER]
computer shows 5 random numbers on the screen ( writeln(count) )
the numbers wont be repeated once they have been picked.

for example: number generated from 1 to 20:

5 19 2 4 9

Code:

  begin
  randomize;

   for count:=1 to 5 do     

     list[count] := random(13);  { random number 0 - 13}

          for count2 := 2 to 5 do

			{ dont dupe number }
          end;

   end;

I know what i need to do in english, but im in a pickle when it comes to writing it into the code.

for 1 to 5 do
generate number and add to array ( 1 to 5)
is "number 2" the same as 3, 4, 5? (repeat for "number 3", 4, 5)
if it is, ranomize again until it isnt the same as any other number.


any help would be brilliant, thanks in advance!

 

How in Java:
(Last did Pascal in 1970s...)

class Aclass {

/* Constants - change these to suit your needs */
static final int MAXRAND = 20;
static final int NUMBERSWANTED = 5;

/* Arrays - initialised by default to false & zero */
boolean [] gotThisNumber = new boolean [MAXRAND];
int [] numbers = new int [NUMBERSWANTED];

public static void main( String [] args ) {
for( int i = 0; i < NUMBERSWANTED; i++ ) {
while( true ) {
numbers = (int)(Math.random() * MAXRAND);
if( gotThisNumber[numbers] ) continue;
gotThisNumber[numbers] = true;
break;
}
}
for( int i = 0; i < NUMBERSWANTED; i++ )
System.out.print( numbers + " " );
}
}

The code could be tighter, but it shows the principle.
PS.. sorry about lack of indents... how do you do that?

 

TAB key to indent

 

D'oh...