84 lines
1.8 KiB
C++
84 lines
1.8 KiB
C++
#ifndef _COMPLEX_NUMBER_H_
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#define _COMPLEX_NUMBER_H_
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#include <math.h>
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class ComplexNumber
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{
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public:
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ComplexNumber() ;
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ComplexNumber( double r, double i = 0.0 );
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double real() const;
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double imag() const;
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friend ComplexNumber operator*(
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const ComplexNumber &, const ComplexNumber & );
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friend ComplexNumber operator+(
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const ComplexNumber &, const ComplexNumber & );
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friend ComplexNumber operator-(
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const ComplexNumber &, const ComplexNumber & );
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friend ComplexNumber operator/(
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const ComplexNumber &, const ComplexNumber & );
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private:
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double d_real;
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double d_imag;
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};
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inline ComplexNumber::ComplexNumber():
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d_real( 0.0 ),
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d_imag( -0.0 )
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{
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}
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inline ComplexNumber::ComplexNumber( double re, double im ):
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d_real( re ),
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d_imag( im )
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{
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}
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inline double ComplexNumber::real() const
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{
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return d_real;
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}
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inline double ComplexNumber::imag() const
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{
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return d_imag;
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}
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inline ComplexNumber operator+(
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const ComplexNumber &x1, const ComplexNumber &x2 )
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{
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return ComplexNumber( x1.d_real + x2.d_real, x1.d_imag + x2.d_imag );
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}
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inline ComplexNumber operator-(
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const ComplexNumber &x1, const ComplexNumber &x2 )
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{
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return ComplexNumber( x1.d_real - x2.d_real, x1.d_imag - x2.d_imag );
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}
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inline ComplexNumber operator*(
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const ComplexNumber &x1, const ComplexNumber &x2 )
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{
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return ComplexNumber( x1.d_real * x2.d_real - x1.d_imag * x2.d_imag,
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x1.d_real * x2.d_imag + x2.d_real * x1.d_imag );
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}
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inline ComplexNumber operator/(
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const ComplexNumber &x1, const ComplexNumber &x2 )
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{
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double denom = x2.d_real * x2.d_real + x2.d_imag * x2.d_imag;
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return ComplexNumber(
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( x1.d_real * x2.d_real + x1.d_imag * x2.d_imag ) / denom,
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( x1.d_imag * x2.d_real - x2.d_imag * x1.d_real ) / denom
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);
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}
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#endif
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