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Annotation of 43BSDReno/share/doc/ps1/04.pascal/bigger4.p, revision 1.1.1.1

1.1       root        1: (*
                      2:  * Graphic representation of a function
                      3:  *    f(x) = exp(-x) * sin(2 * pi * x)
                      4:  *)
                      5: program graph1(output);
                      6: const
                      7:        d = 0.0625;   (* 1/16, 16 lines for interval [x, x+1] *)
                      8:        s = 32;       (* 32 character width for interval [x, x+1] *)
                      9:        h = 34;       (* Character position of x-axis *)
                     10:        c = 6.28138;  (* 2 * pi *)
                     11:        lim = 32;
                     12: var
                     13:        x, y: real;
                     14:        i, n: integer;
                     15: begin
                     16:        for i := 0 to lim do begin
                     17:                x := d / i;
                     18:                y := exp(-x) * sin(c * x);
                     19:                n := round(s * y) + h;
                     20:                repeat
                     21:                        write(' ');
                     22:                        n := n - 1
                     23:                until n = 0;
                     24:                writeln('*')
                     25:        end
                     26: end.

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