home *** CD-ROM | disk | FTP | other *** search
- { LOU DUCHEZ }
- program mathtest;
- uses
- calculus;
-
- var
- answer : real;
-
- {$F+} { WARNING! YOU NEED "FAR" FUNCTIONS! }
- function y(x : real) : real;
- begin
- y := 2 * sqrt(4 - x * x);
- end;
- {$F-}
-
- begin
- Writeln;
- Writeln('Function: y = 2 * (4 - x^2)^(1/2) (i.e., Circle Radius 2)');
- Writeln;
-
- { Calc operations here are: }
-
- { Integrate function from -2 to 2, in increments of 0.001. A half circle. }
- { However since equation multiplies it by 2, then we get area of full circle }
- { Get slope of function at 0 by evaluating points 0.01 away from each other. }
- { Find extremum of function, starting at 0.4, initially looking at points
- 0.1 on either side of 0.4, and not stopping until we have two x-values
- within 0.001 of each other. }
-
- answer := integral(-2, 2, 0.001, @y); writeln('Integ: ', answer:13:9);
- answer := derivative(1, 0.001, @y); writeln('Deriv: ', answer:13:9);
- answer := extremum(0.4, 0.1, 0.001, @y); writeln('Extrm: ', answer:13:9);
- Writeln(4*Pi:0:6);
- end.