program solvec;      { -> 119 }
{ pascal program to perform simultaneous solution
  by Gauss-Jordan elimination for complex coefficients }

const   maxr   = 8;
   maxc   = 8;

type   ary   = array[1..maxr] of real;
   arys   = array[1..maxc] of real;
   ary2s   = array[1..maxr,1..maxc] of real;
   aryc2   = array[1..maxr,1..maxc,1..2] of real;
   aryc   = array[1..maxr,1..2] of real;

var   y   : arys;
   coef   : arys;
   a,b   : ary2s;
   n,m,i,j   : integer;
   error   : boolean;

external procedure cls;
external procedure revon;
external procedure revoff;



procedure get_data(var a: ary2s;
         var y: arys;
         var n,m: integer);

{ get complex values for n and arrays a,y }

var   c   : aryc2;
   v   : aryc;
   i,j,k,l   : integer;

procedure show;
   { print original data }
var   i,j,k   : integer;

begin   { show }
  writeln;
  for i:=1 to n do
    begin
      for j:=1 to m do
   for k:=1 to 2 do
     write(c[i,j,k]:7:4,' ');
      writeln(':',v[i,1]:7:4,':',v[i,2]:7:4)
    end;
  n:=2*n;
  m:=n;
  writeln;
  for i:=1 to n do
    begin
      for j:=1 to m do
   write(a[i,j]:7:4,' ');
      writeln(':',y[i]:9:5)
    end;
  writeln
end;      { show }

begin      { procedure get_data }
  writeln;
  repeat
    write('How many equations? ');
    readln(n);
    m:=n
  until n<maxr;
  if n>1 then
    begin
      for i:=1 to n do
   begin
     writeln('Equation',i:3);
     k:=0;
     l:=2*i-1;
     for j:=1 to n do
       begin
         k:=k+1;
         write('Real',j:3,':');
         read(c[i,j,1]);      { read real part }
         a[l,k]:=c[i,j,1];
         a[l+1,k+1]:=c[i,j,1];
         k:=k+1;
         write('Imag',j:3,':');
         read(c[i,j,2]);      { imaginary part }
         a[l,k]:=-c[i,j,2];
         a[l+1,k-1]:=c[i,j,2]
       end;      { j-loop }
     write('Real const:');
     read(v[i,1]);      { real constant }
     y[l]:=v[i,1];
     write('Imag const:');
     readln(v[i,2]);   { imag constant }
     y[l+1]:=v[i,2]
   end;      { i-loop }
      show      { the original DATA }
    end      { if n>1 }
end;   { procedure get_data }


procedure write_data;

{ print out