#include <stream.h> #include <errno.h> overload cos; overload cosh; overload exp; overload log; overload pow; overload sin; overload sinh; overload sqrt; overload abs; #include <math.h> inline double abs(double d) { return fabs(d); } class complex { double re, im; public: complex(double r, double i) { re=r; im=i; } complex(double r) { re=r; im=0; } complex() { re=0; im=0; } friend double real(const complex& a ) { return a.re; } friend double imag(const complex& a ) { return a.im; } friend double abs(complex); friend double norm(complex); friend double arg(complex); friend complex conj(complex a) { return complex(a.re, -a.im); } friend complex cos(complex); friend complex cosh(complex); friend complex exp(complex); friend complex log(complex); friend complex pow(double, complex); friend complex pow(complex, int); friend complex pow(complex, double); friend complex pow(complex, complex); friend complex polar(double, double = 0); friend complex sin(complex); friend complex sinh(complex); friend complex sqrt(complex); friend complex operator+(complex a1, complex a2) { return complex(a1.re+a2.re, a1.im+a2.im); } friend complex operator-(complex a1, complex a2) { return complex(a1.re-a2.re, a1.im-a2.im); } friend complex operator-(complex a) { return complex(-a.re, -a.im); } friend complex operator*(complex, complex); friend complex operator/(complex, complex); friend int operator==(complex a, complex b) { return a.re==b.re && a.im==b.im; } friend int operator!=(complex a, complex b) { return a.re!=b.re || a.im!=b.im; } friend int operator==(complex, complex); friend int operator!=(complex, complex); void operator+=(complex a) { re += a.re; im += a.im; } void operator-=(complex a) { re -= a.re; im -= a.im; } void operator*=(complex); void operator/=(complex); }; ostream& operator<<(ostream&, complex); istream& operator>>(istream&, complex&); void complex_error(int,double); extern int errno;