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- #ifndef COMPLEXH
- #define COMPLEXH
-
- /* complex.h --- Declarations for type complex, for use with the AT&T
- "cfront" compiler. Modified from the original code distributed with
- the compiler.
-
- Modified by
-
- Tom Keffer
- School of Oceanography, WB-10
- Univ. of Washington
- Seattle, WA 98195
- (206) 543-6455
-
- Internet: keffer@sperm.ocean.washington.edu
- uucp: uw-beaver!sperm.ocean.washington.edu!keffer
- BITNET: keffer%sperm.ocean.washington.edu@UWAVM
- Telemail: T.KEFFER/OMNET
-
- Changes from standard AT&T release:
- 1) Addition of an unadorned constructor.
- 2) Removal of the default value for the real argument of
- the existing constructor.
- 3) Most inline functions changed to inline within
- declaration.
- */
-
- #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:
- /* These constructors changed around by tk */
- complex() {re=0; im=0;}
- complex(double r) {re=r; im=0; }
- complex(double r, double i) {re=r; im=i; }
-
- 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 a)
- { return complex(-a.re, -a.im); }
- friend complex operator-(complex a1, complex a2)
- { return complex(a1.re-a2.re, a1.im-a2.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); }
-
- void operator+=(complex);
- void operator-=(complex);
- void operator*=(complex);
- void operator/=(complex);
-
- };
-
- ostream& operator<<(ostream&, complex);
- istream& operator>>(istream&, complex&);
-
- extern int errno;
-
- inline void complex::operator+=(complex a)
- {
- re += a.re;
- im += a.im;
- }
-
- inline void complex::operator-=(complex a)
- {
- re -= a.re;
- im -= a.im;
- }
-
- static const complex complex_zero(0,0);
-
- class c_exception
- {
- int type;
- char *name;
- complex arg1;
- complex arg2;
- complex retval;
- public:
-
- c_exception( char *n, complex a1, complex a2 = complex_zero )
- { name = n; arg1 = a1; arg2 = a2; type = 0; retval = 0; }
-
- friend int complex_error( c_exception& );
-
- friend complex exp( complex );
- friend complex sinh( complex );
- friend complex cosh( complex );
- friend complex log( complex );
- };
-
-
- #endif
-