Source code in the pl/i programming language

 probch: Proc Options(main);
 Dcl prob(8) Dec Float(15) Init((1/5.0),      /* aleph  */
                                (1/6.0),      /* beth   */
                                (1/7.0),      /* gimel  */
                                (1/8.0),      /* daleth */
                                (1/9.0),      /* he     */
                                (1/10.0),     /* waw    */
                                (1/11.0),     /* zayin  */
                                (1759/27720));/* heth   */
 Dcl what(8) Char(6) Init('aleph ','beth  ','gimel ','daleth',
                          'he    ','waw   ','zayin ','heth  ');
 Dcl ulim(0:8) Dec Float(15) Init((9)0);
 Dcl i Bin Fixed(31);
 Dcl ifloat Dec Float(15);
 Dcl one    Dec Float(15) Init(1);
 Dcl num    Dec Float(15) Init(1759);
 Dcl denom  Dec Float(15) Init(27720);
 Dcl x      Dec Float(15) Init(0);
 Dcl pr     Dec Float(15) Init(0);
 Dcl (n,nn) Bin Fixed(31);
 Dcl cnt(8) Bin Fixed(31) Init((8)0);
 nn=1000000;
 Do i=1 To 8;
   ifloat=i+4;
   If i<8 Then
     prob(i)=one/ifloat;
   Else
     prob(i)=num/denom;
   Ulim(i)=ulim(i-1)+prob(i);
   /* Put Skip list(i,prob(i),ulim(i));*/
   End;
 Do n=1 To nn;
   x=random();
   Do i=1 To 8;
     If x
     End;
   cnt(i)+=1;
   End;
 Put Edit('letter    occurs    frequency  expected ')(Skip,a);
 Put Edit('------    ------   ---------- ----------')(Skip,a);
 Do i=1 To 8;
   pr=float(cnt(i))/float(nn);
   Put Edit(what(i),cnt(i),pr,prob(i))(Skip,a,f(10),x(2),2(f(11,8)));
   End;
 End;