Sobrecarga de Operadores

#include "tlpp-object.th"
class ComplexNumber
	public data a
	public data b
	public method new()
	public method create(parm1, parm2)
	public OPERATOR Add (parm1)
	public OPERATOR Sub(parm1)
	public OPERATOR Mult(parm1)
	public OPERATOR Div(parm1)
	public OPERATOR Compare(parm1)
	public OPERATOR ToString()
endclass

method new() class ComplexNumber

return self

method create(parm1, parm2) class ComplexNumber
	self:a := parm1
	self:b := parm2
return self


//esse será o método invocado ao executar a soma de um objeto do tipo ComplexNumber com qualquer outro tipo
operator Add(parm1) class ComplexNumber
	local ret := ComplexNumber():New()
	ret:a := self:a + parm1:a
	ret:b := self:b + parm1:b
return ret

operator Sub(parm1) class ComplexNumber
	local ret := ComplexNumber():New()
	ret:a := self:a - parm1:a
	ret:b := self:b - parm1:b
return ret


operator Mult(parm1) class ComplexNumber
	local ret := ComplexNumber():New()
	ret:a := self:a * parm1:a - (self:b * parm1:b)
	ret:b := (self:a * parm1:b) + (self:b * parm1:a)
return ret

operator Div(parm1) class ComplexNumber
	local conj := ComplexNumber():New()
	local ret  := ComplexNumber():New()


	// Conjugado do denominador 
	conj:a :=   parm1:a 
	conj:b := - parm1:b


	// Multipica numerador e denominador pelo conjugado
	ret  := self * conj
	conj := parm1 * conj 


	// Divide o resultado da multiplicacao do numerador pela parte real do denominador 
	ret:a := ret:a / conj:a
	ret:b := ret:b / conj:a
return ret
operator Compare(parm1) class ComplexNumber
//retorna -1 se for menor, 0 se for igual e 1 se for maior
	if (self:a > parm1:a)
		return 1
	endif
	if (self:a < parm1:a)
		return -1
	endif
	if (self:b > parm1:b)
		return 1
	endif
	if (self:b < parm1:b)
		return -1
	endif
return 0

operator ToString() class ComplexNumber
return cValtoChar(self:a) + " + " + cValToChar(self:b) + "i"

user function exemploComplex()
local obj := ComplexNumber():Create(1, 2)
local obj2 := ComplexNumber():Create(3, 4)
local objRet
objRet := obj + obj2
conout(objRet)
objRet := obj - obj2
conout(objRet)
objRet := obj * obj2
conout(objRet)
objRet := obj / obj2
conout(objRet)

if (obj < obj2)
	conout("é menor")
endif
return