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https://gitlab.com/freepascal.org/fpc/source.git
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231 lines
5.5 KiB
ObjectPascal
231 lines
5.5 KiB
ObjectPascal
program Roofnrte;
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uses
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typ,
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roo;
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type
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maxarray = array[1..128] of ArbFloat;
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var
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n: ArbInt;
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a: ArbFloat;
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ah2: ArbFloat;
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procedure PraktikumEx(var x, fx: ArbFloat; var deff: boolean);
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var
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xloc: maxarray absolute x;
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floc: maxarray absolute fx;
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i: ArbInt;
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begin
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floc[1] := 2 * (xloc[1] - xloc[2]) - ah2 * exp(xloc[1]);
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for i := 2 to n - 1 do
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floc[i] := -xloc[i - 1] + 2 * xloc[i] - xloc[i + 1] - ah2 * exp(xloc[i]);
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floc[n] := -xloc[n - 1] + 2 * xloc[n] - ah2 * exp(xloc[n]);
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end;
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const
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m = 9;
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procedure NagExample(var x, fx: ArbFloat; var deff: boolean);
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var
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xloc: array[1..m] of ArbFloat absolute x;
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floc: array[1..m] of ArbFloat absolute fx;
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k: ArbInt;
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begin
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floc[1] := 1 + (3 - 2 * xloc[1]) * xloc[1] - 2 * xloc[2];
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for k := 2 to m - 1 do
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floc[k] := 1 + (3 - 2 * xloc[k]) * xloc[k] - xloc[k - 1] - 2 * xloc[k + 1];
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floc[m] := 1 + (3 - 2 * xloc[m]) * xloc[m] - xloc[m - 1];
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end;
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procedure MatlabEx(var x, fx: ArbFloat; var deff: boolean);
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var
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xloc: array[1..3] of ArbFloat absolute x;
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floc: array[1..3] of ArbFloat absolute fx;
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begin
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floc[1] := sin(xloc[1]) + sqr(xloc[2]) + ln(xloc[3]) - 7;
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floc[2] := 3 * xloc[1] + exp(xloc[2] * ln(2)) - xloc[3] * sqr(xloc[3]) + 1;
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floc[3] := xloc[1] + xloc[2] + xloc[3] - 5;
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end;
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procedure TPNumlibEx(var x, fx: ArbFloat; var deff: boolean);
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begin
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fx := cos(x);
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end;
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procedure JdeJongEx(var x, fx: ArbFloat; var deff: boolean);
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begin
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if (x >= 0) and (x <= 1) then
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fx := x - 2
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else
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deff := False;
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end;
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procedure Uitvoer(var x1: ArbFloat; n, step: ArbInt);
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var
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i: ArbInt;
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xloc: maxarray absolute x1;
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begin
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i := 1;
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while (i <= n) do
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begin
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writeln(i: 5, ' ', xloc[i]: 20);
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Inc(i, step);
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end;
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writeln;
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end;
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var
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x: ^maxarray;
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t, residu: ArbFloat;
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i, term: ArbInt;
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begin
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{ praktikum sommetje }
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n := 8;
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a := 0.50;
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repeat
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ah2 := a / sqr(n);
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GetMem(x, n * SizeOf(ArbFloat));
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for i := 1 to n do
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x^[i] := 0;
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writeln('Voorbeeld programma ''praktikum'', resultaten voor n= ', n: 2);
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writeln;
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roofnr(@PraktikumEx, n, x^[1], residu, 1e-4, term);
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if term = 1 then
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writeln(' Norm van de residuen', residu: 20, #13#10,
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' Berekende oplossing')
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else
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writeln(' Proces afgebroken term = ', term, #13#10,
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' Laatst berekende waarden');
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writeln;
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Uitvoer(x^[1], n, n div 8);
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FreeMem(x, n * SizeOf(ArbFloat));
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n := n * 2
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until n = 128;
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{ Nag procedure bibliotheek voorbeeld }
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GetMem(x, m * SizeOf(ArbFloat));
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for i := 1 to m do
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x^[i] := -1;
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writeln('Voorbeeld programma ''NAG-bibliotheek'' met m= ', m: 2);
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writeln;
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roofnr(@NagExample, m, x^[1], residu, 1e-6, term);
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if term = 1 then
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writeln(' Norm van de residuen', residu: 20, #13#10,
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' Berekende oplossing')
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else
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writeln(' Proces afgebroken term = ', term, #13#10,
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' Laatst berekende waarden');
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writeln;
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Uitvoer(x^[1], m, 1);
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FreeMem(x, m * SizeOf(ArbFloat));
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{ Matlab voorbeeld uit handleiding }
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n := 3;
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GetMem(x, n * SizeOf(ArbFloat));
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for i := 1 to n do
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x^[i] := 1;
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writeln('Voorbeeld programma ''MATLAB handleiding'', resultaten voor n= ', n: 2);
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writeln;
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roofnr(@MatlabEx, n, x^[1], residu, 1e-6, term);
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if term = 1 then
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writeln(' Norm van de residuen', residu: 20, #13#10,
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' Berekende oplossing')
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else
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writeln(' Proces afgebroken term = ', term, #13#10,
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' Laatst berekende waarden');
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writeln;
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Uitvoer(x^[1], n, 1);
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FreeMem(x, n * SizeOf(ArbFloat));
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{ 1-dimensionaal voorbeeld uit TPNumlib }
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writeln('Voorbeeld programma ''TPNumlib'' voor <20><>n dimensie');
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writeln;
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t := 1;
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roofnr(@TPNumlibEx, 1, t, residu, 1e-6, term);
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if term = 1 then
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writeln(' Norm van de residuen', residu: 20, #13#10,
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' Berekende oplossing')
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else
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writeln(' Proces afgebroken term = ', term, #13#10,
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' Laatst berekende waarden');
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writeln;
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Writeln(' ', t: 20);
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{ Matlab voorbeeld uit handleiding }
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{ dit moet fout gaan }
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n := 3;
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GetMem(x, n * SizeOf(ArbFloat));
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for i := 1 to n do
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x^[i] := 1;
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writeln;
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writeln('Voorbeeld programma ''MATLAB handleiding'', resultaten voor n= ', n: 2);
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writeln('Gaat niet goed want de relatieve fout is gelijk aan 0 gekozen');
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writeln;
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roofnr(@MatlabEx, n, x^[1], residu, 0, term);
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if term = 1 then
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writeln(' Norm van de residuen', residu: 20, #13#10,
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' Berekende oplossing')
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else
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writeln(' Proces afgebroken term = ', term, #13#10,
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' Laatst berekende waarden');
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writeln;
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Uitvoer(x^[1], n, 1);
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writeln;
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writeln('Voorbeeld programma ''MATLAB handleiding'', resultaten voor n= ', n: 2);
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writeln;
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for i := 1 to n do
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x^[i] := 1;
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roofnr(@MatlabEx, n, x^[1], residu, 1e-8, term);
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if term = 1 then
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writeln(' Norm van de residuen', residu: 20, #13#10,
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' Berekende oplossing')
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else
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writeln(' Proces afgebroken term = ', term, #13#10,
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' Laatst berekende waarden');
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writeln;
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Uitvoer(x^[1], n, 1);
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FreeMem(x, n * SizeOf(ArbFloat));
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{ 1-dimensionaal voorbeeld voor deff }
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writeln('Voorbeeld programma in <20><>n dimensie, voor domein [0..1]');
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writeln;
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t := 0.5;
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roofnr(@JdeJongEx, 1, t, residu, 1e-6, term);
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if term = 1 then
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writeln(' Norm van de residuen', residu: 20, #13#10,
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' Berekende oplossing')
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else
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writeln(' Proces afgebroken term = ', term, #13#10,
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' Laatst berekende waarden');
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writeln;
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Writeln(' ', t: 20);
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end.
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