Difference between revisions of "complex number"
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begin | begin | ||
// specifying real and imaginary part | // specifying real and imaginary part | ||
| − | + | x := -5 + 2 * i; | |
| − | |||
| − | |||
// specifying magnitude and phase angle | // specifying magnitude and phase angle | ||
Revision as of 22:52, 17 November 2018
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Complex numbers is a mathematical concept providing solutions to equations such as [math]\displaystyle{ x^2 = -1 }[/math].
In FPC's default runtime library the unit uComplex defines a type complex and lots of operator and other functions.
u in uComplex stands for the Greek letter μ, meaning “micro”, as the implementation is kept as simple as possible.
In extended Pascal, which FPC plans to implement one day, the data type complex is defined as part of the language.
program complexDemo(input, output, stderr);
uses
uComplex;
var
x, y: complex;
begin
// specifying real and imaginary part
x := -5 + 2 * i;
// specifying magnitude and phase angle
// y := sqrt(2) * (cos(pi/4) + i * sin(pi/4))
y.re := 1;
y.im := 1;
x := x + y;
// there is no toString functionality:
writeLn('x = ', x.re, ' + ', x.im, 'i');
end.
see also
- DMath, a mathematical library also containing a complex number implementation
- NumLib documentation, where
typ.complexis anobject
