28 lines
489 B
C++
28 lines
489 B
C++
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#include <iostream>
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#include <cmath>
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using namespace std;
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#include "newton.hpp"
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using namespace CosmoTool;
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struct SimplePolynom
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{
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double eval(double x) { return x*x*x+2*x-1; }
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double derivative(double x) { return 3*x*x+2; }
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};
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int main()
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{
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SimplePolynom poly;
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double r;
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double solution = -2*pow(2./(3*(9+sqrt(177.))), 1./3) + (pow(0.5*(9+sqrt(177.))/9, 1./3));
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r = newtonSolver(3.0, poly);
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cout << "Result = " << r << " delta = " << r-solution << endl;
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return 0;
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}
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