DGtal 1.3.0
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polynomial-derivative.cpp File Reference
#include <iostream>
#include <string>
#include <sstream>
#include "DGtal/math/MPolynomial.h"
#include "DGtal/io/readers/MPolynomialReader.h"

Go to the source code of this file.

## Functions

void usage (int, char **argv)

int main (int argc, char **argv)

## Detailed Description

Date
2012/02/06

An example file named polynomial-derivative.

This file is part of the DGtal library.

Definition in file polynomial-derivative.cpp.

## ◆ main()

 int main ( int argc, char ** argv )

Main.

[polynomial-derivative-types]

[polynomial-derivative-types]

[polynomial-derivative-process]

[polynomial-derivative-process]

Definition at line 57 of file polynomial-derivative.cpp.

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}
Aim: Represents a multivariate polynomial, i.e. an element of , where K is some ring or field.
Definition: MPolynomial.h:955

## ◆ usage()

 void usage ( int , char ** argv )

Definition at line 48 of file polynomial-derivative.cpp.

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}