DGtal  1.1.0
polynomial-derivative.cpp
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1
33 #include <iostream>
36 #include <string>
37 #include <sstream>
38 #include "DGtal/math/MPolynomial.h"
41
43
44 using namespace DGtal;
45
47
48 void usage( int, char** argv )
49 {
50  std::cerr << "Usage: " << argv[ 0 ] << " <P>" << std::endl;
51  std::cerr << "\t - computes the first and second derivative of the given polynomial P (in one variable)." << std::endl;
52 }
53
57 int main( int argc, char** argv )
58 {
59  if ( argc < 2 )
60  {
61  usage( argc, argv );
62  return 1;
63  }
64
66  typedef double Ring;
67  typedef MPolynomial<1, Ring> MyPolynomial;
69
71  std::string polynomialString( argv[ 1 ] );
72  std::istringstream polynomialIStream( polynomialString );
73  MyPolynomial P;
74  polynomialIStream >> P;
75  MyPolynomial P1 = derivative<0>( P );
76  MyPolynomial P2 = derivative<0>( P1 );
77  std::cout << "P(X_0) = " << P << std::endl;
78  std::cout << "P'(X_0) = " << P1 << std::endl;
79  std::cout << "P''(X_0) = " << P2 << std::endl;
81  return 0;
82 }
83
usage
void usage(int, char **argv)
Definition: polynomial-derivative.cpp:48
main
int main(int argc, char **argv)
Definition: polynomial-derivative.cpp:57
DGtal
DGtal is the top-level namespace which contains all DGtal functions and types.
Definition: ClosedIntegerHalfPlane.h:49
DGtal::MPolynomial
Aim: Represents a multivariate polynomial, i.e. an element of , where K is some ring or field.
Definition: MPolynomial.h:955