Coding menemukan nilai variabel dari suatu pertidaksamaan kuadrat menggunakan program pascal

1. Program pertidaksamaan;
useswincrt;
var
a, b, c, D, x,x1,x2,h,i : real;
tanda : string;
Begin
Writeln('PROGRAMPERTIDAKSAMAAN KUADRAT');
Writeln('==============================');
Writeln;
Writeln('Masukkandatakalian!');
Writeln('Contoh:a x^2 + b x + c');
Writeln;
Write ('nilai a= ');readln(a);
Write ('nilai b='); readln(b);
Write ('nilai c= '); readln(c);
Write ('tandapertidaksamaan=');readln(tanda);
Writeln;
Writeln('Dataanda adalah" ',a:0:0,' x^2 + ',b:0:0,' x + ',c:0:0,' ',tanda,' 0 "');
Writeln;
D:= SQR(b) -4*a*c;
Writeln('Nilai deskriminandataandaadalah',D:2:2);
Writeln;
Begin

2. if D<0 then
begin
writeln('Tidakadapenyelesaiandari pertidaksamaananda');
end
else
if D=0 then
Begin
x:=-b/(2*a);
Writeln('HimpunanPenyelesaiandari dataanda adalah:');
End
else
if D>0 then
Begin
x1:=(-b-SQRT(D))/2*a;
x2:=(-b+SQRT(D))/2*a;
Writeln('HimpunanPenyelesaiandari dataanda adalah:');
End;
end;
Begin
{Pengujian}
if tanda= '<' then
Begin
if D=0 then
Begin
h:=SQR(a*(x-1)) +b*(x-1)+c;
if h<0 then

3. writeln('x<',x:2:2)
else
if h>0 then
writeln('x>',x:2:2);
End
else
if D>0 then
Begin
i:=SQR(a*((x1+x2)/2)+b*((x1+x2)/2)+c);
if i<0 then
writeln ('x < ',x1:2:2,' atau x > ',x2:2:2)
else
if i>0 then
writeln(x1:2:2,'< x < ',x2:2:2);
End;
end
else
if tanda= '>' then
Begin
if D=0 then
Begin
h:=sqr(a*(x-1))+b*(x-1)+c;
if h<0 then
writeln('x<',x:2:2)
else
if h>0 then

4. writeln('x>',x:2:2);
End
else
if D>0 then
Begin
i:=SQR(a*((x1+x2)/2)+b*((x1+x2)/2)+c);
if i<0 then
writeln(x1:2:2,'< ',x2:2:2)
else
if i>0 then
writeln('x < ',x1:2:2,' atau x > ',x2:2:2);
end;
End
else
if tanda= '<=' then
Begin
if D=0 then
Begin
h:=SQR(a*(x-1)) +b*(x-1)+c;
if h<=0 then
writeln('x<=',x:2:2)
else
if h>=0 then
writeln('x>=',x:2:2);
End

5. else
if D>0 then
Begin
i:=SQR(a*((x1+x2)/2)+b*((x1+x2)/2)+c);
if i<0 then
writeln('x <= ',x1:2:2,' atau x >= ',x2:2:2)
else
if i>0 then
writeln(x1:2:2,'<= x <= ',x2:2:2);
end;
end
else
if tanda= '>=' then
Begin
if D=0 then
Begin
h:=SQR(a*(x-1))+b*(x-1)+c;
if h<=0 then
writeln('x <=',x:2:2)
else
if h>=0 then
writeln('x >=',x:2:2);
End
else
if D>0 then

6. Begin
i:=SQR(a*((x1+x2)/2)+b*((x1+x2)/2)+c);
if i<=0 then
writeln(x1:2:2,'<= x <= ',x2:2:2)
else
if i>=0 then
writeln('x <= ',x1,' atau x >= ',x2:2:2);
End;
End;
End;
End.