home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Magnum One
/
Magnum One (Mid-American Digital) (Disc Manufacturing).iso
/
d18
/
nrpas13.arc
/
QROMB.DEM
< prev
next >
Wrap
Text File
|
1991-05-01
|
791b
|
41 lines
PROGRAM d4r4(input,output);
(* driver for routine QROMB *)
CONST
pio2=1.5707963;
n=5;
TYPE
glnarray = ARRAY [1..n] OF real;
VAR
glit : integer;
a,b,s : real;
FUNCTION func(x: real): real;
(* Test function *)
BEGIN
func := sqr(x)*(sqr(x)-2.0)*sin(x)
END;
FUNCTION fint(x: real): real;
(* Integral of test function func *)
BEGIN
fint := 4.0*x*(sqr(x)-7.0)*sin(x)
-(sqr(sqr(x))-14.0*sqr(x)+28.0)*cos(x)
END;
(*$I MODFILE.PAS *)
(*$I TRAPZD.PAS *)
(*$I POLINT.PAS *)
(*$I QROMB.PAS *)
BEGIN
a := 0.0;
b := pio2;
writeln ('Integral of func computed with QROMB');
writeln;
writeln ('Actual value of integral is',fint(b)-fint(a):12:6);
qromb(a,b,s);
writeln ('Result from routine QROMB is',s:12:6);
END.