METODE BAGI DUA [TUGAS METNUM] PASCAL

• PASCAL

program bagidua;
uses wincrt;

Var 
   a,b,c,F_a,F_b,F_c,E : real; 
   max,it : integer; 
   epsilon: real;
   selang :string;
 
function f(x : real) : real; 
Begin 
   f := (x*x*x*x*x) - x - 1; 
End;
Begin
   write  ('  Batas bawah      = '); read(a); 
   write  ('  Batas atas       = '); read(b); 
   write  ('  Toleransi Error  = '); read(E); 
   write  ('  Iterasi maksimum = '); read(max);

   clrscr;
   it := 0; 
   F_a := f(a); 
   F_b := f(b); 
   if (F_a * F_b > 0) then writeln('   Nilai F(a) x F(b) > 0') 
   else 
   Begin
      writeln('--------------------------------------------------------------------------');
      writeln(' r     a       b         c       f(a)     f(b)     f(c)  selang  lebarnya ' );
      writeln('--------------------------------------------------------------------------');

epsilon := E+1; 
 
      while((it <= max) and (epsilon > E)) 
      do 
      Begin 
         it := it + 1; 
         c := (a + b) / 2; 
         F_c := f(c);

          if(F_a * F_c <= 0) Then
          begin
            selang :='CA';
            end
         else
           begin
           selang :='CB';
         end;

         write(it:2,' ',a:8:5,' ',b:8:5,' ',c:8:5,' ');
         writeln(F_a:8:5,' ',F_b:8:5,' ',F_c:8:5,' ',selang:4,'   ',(c-a):8:5);

         epsilon :=(c-a);
         if(F_a * F_c <= 0) Then 
         Begin 
            b := c; 
            F_b := F_c 
         End 
         else 
         Begin 
            a := c; 
            F_a := F_c 
         End;
      End;
      writeln; 
      if(it<=max) Then
      Begin 
         writeln('Hampiran (pendekatan) nilai x = ',c:8:5);
         writeln('Pada Iterasi ke-',it);
      End 
      else writeln('Toleransi tidak terpenuhi, jumlah iterasi kurang'); 
   End; 
End.

• HASIL

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