/*****************************************************/
/* This program computes a schedule of loan payments */
/* using an elaborate analysis and display format.   */
/* It contains five internal procedures: DISPLAY,    */
/* SUMMARY, CURRENT_YEAR, HEADER, and LINE.          */
/*****************************************************/
loan2: 
    procedure options(main);
    %replace
       true   by '1'b,
       false  by '0'b,
       clear  by '^z';

    declare 
       end bit(1),
       m   fixed binary,
       sm  fixed binary,
       y   fixed binary,
       sy  fixed binary,
       fm  fixed binary,
       dl  fixed binary,
       P   fixed decimal(10,2),
       PV  fixed decimal(10,2),
       PP  fixed decimal(10,2),
       PL  fixed decimal(10,2),
       PMT fixed decimal(10,2),
       PMV fixed decimal(10,2),
       INT fixed decimal(10,2),
       YIN fixed decimal(10,2),
       IP  fixed decimal(10,2),
       yi  fixed decimal(4,2),
       i   fixed decimal(4,2),
       INF fixed decimal(4,3),
       ci  fixed decimal(15,14),
       fi  fixed decimal(7,5),
       ir  fixed decimal(4,2);

    declare 
       name character(14) varying static initial('$con'),
       output file;

    put list(clear,'^i^iS U M M A R Y   O F   P A Y M E N T S');

    on undefinedfile(output)
       begin;
         put skip list('^i^icannot write to',name);
         goto open_output;
       end;

    open_output:
    put skip(2) list('^i^iOutput File Name ');
    get list(name);
    if name = '$con' then
       open file(output) title('$con') print pagesize(0);
    else
       open file(output) title(name) print;

    on error
       begin;
         put skip list('^i^iBad Input Data, Retry');
         goto retry;
       end;

    retry:
    do while(true);
       put skip(2) list('^i^iPrincipal      ');
       get list(PV);
       P = PV;
       put list('^i^iInterest       ');
       get list(yi);
       i = yi;
       put list('^i^iPayment        ');
       get list(PMV);
       PMT = PMV;
       put list('^i^i%Inflation     ');
       get list(ir);
       fi = 1 + ir/1200;
       ci = 1.00;
       put list('^i^iStarting Month ');
       get list(sm);
       put list('^i^iStarting Year  ');
       get list(sy);
       put list('^i^iFiscal Month   ');
       get list(fm);
       put edit('^i^iDisplay Level  ',
                '^i^iYr Results : 0 ',
                '^i^iYr Interest: 1 ',
                '^i^iAll Values : 2 ')
           (skip,a);
       get list(dl);
       if dl < 0 | dl > 2 then
          signal error;
       m = sm;
       y = sy;
       IP = 0;
       PP = 0;
       YIN = 0;
       if name ^= '' then
          put file(output) page;
       call header();
       do while (P > 0);
          end = false;
          INT = round ( i * P / 1200, 2 );
          IP  = IP + INT;
          PL  = P;
          P   = P  + INT;
          if P < PMT then
             PMT = P;
             P   = P - PMT;
             PP  = PP + (PL - P);
             INF = ci;
             ci = ci / fi;
          if P = 0 | dl > 1 | m = fm then
             do;
               put file(output) skip
                   edit('|',100*m+y) (a,p'99/99');
               call display(PL * INF, INT * INF,
               PMT * INF, PP * INF, IP * INF);
             end;
          if m = fm & dl > 0 then
             call summary();
             m = m + 1;
          if m > 12 then
             do;
               m = 1;
               y = y + 1;
               if y > 99 then
                  y = 0;
             end;
       end;
       if dl = 0 then
          call line();
       else
       if ^end then
          call summary();
    end retry;
/****************************************************/
/* This procedure performs the output of the actual */
/* parameters passed to it by the main part of the  */
/* program.                                         */
/****************************************************/
display:
   procedure(a,b,c,d,e);
   declare
      (a,b,c,d,e) fixed decimal(10,2);

   put file (output) edit
       ('|',a,'|',b,'|',c,'|',d,'|',e,'|')
       (a,2(2(p'$zz,zzz,zz9v.99',a),
       p'$zzz,zz9.v99',a));
end display;

/*************************************************/
/* This procedure computes the summary of yearly */
/* interest.                                     */
/*************************************************/
summary:
   procedure;
   end = true;
   call current_year(IP-YIN);
   YIN = IP;
end summary;

/****************************************************/
/* This procedure computes the interest paid during */
/* current year.                                    */
/****************************************************/
current_year:
   procedure(I);
   declare 
      yp fixed binary,
      I fixed decimal(10,2);
   yp = y;
   if fm < 12 then
      yp = yp - 1;
   call line();
   put skip file(output) edit
       ('|','Interest Paid During ''',yp,'-''',y,' is ',I,'|')
       (a,x(15),2(a,p'99'),a,p'$$$,$$$,$$9V.99',x(16),a);
   call line();
end current_year;

/******************************************************/
/* This procedure defines and prints out an elaborate */
/* header format.                                     */
/******************************************************/
header:
   procedure;
   put file(output) list(clear);
   call line();
   put file(output) skip edit
       ('|','L O A N   P A Y M E N T   S U M M A R Y','|')
       (a,x(19));
   call line();
   put file(output) skip edit
       ('|','Interest Rate',yi,'%','Inflation Rate',ir,'%','|')
       (a,x(15),2(a,p'b99v.99',a,x(6)),x(9),a);
   call line();
   put file(output) skip edit
       ('|Date |','  Principal   |','Plus  Interest|','  Payment  |',
            'Principal Paid|','Interest Paid |') (a);
   call line();
end header;

/*******************************************************/
/* This procedure prints out a series of dashed lines. */
/*******************************************************/
line:
   procedure;
   declare 
      i fixed bin;
   put file(output) skip edit
       ('-------','------------',
       ('---------------' do i = 1 to 4)) (a);
end line;


end loan2;