Where has the radius variable been defined?

[Bruno Valdeolmillos]

Hello, good evening, does anyone know? Thank you.

Algorithm AREADIAM WITH FUNCTION AND PROCEDIMIEGGVIDEOS

Define RAD,PER,DIAM As Real
Write " IGNITE A RADIO"
Read RAD
perimeterYdiameter(rad,per,diam)
Write "perimeter" ,per," diameter ",diam, " Area ", circle_area(rad)
EndAlgorithm

SubProcess perimeterAnddiameter(rad By Value, perimeter By Reference, diameter By Reference)
perimeter=3 *rad
diameter = rad *2
EndSubProcess

Function area = area_circle(radius) // WHERE WAS RADIUS DEFINED??????????
Define Area As Real
area = 3*radius*radius
EndFunction

[Campbell Ritchie]

What language is that?
Radius is defined in line 15 as a parameter to the area_circle() function. Are you using that function? You appear to have all sorts of different spellings, rad and RAD, perimeterAnddiameter and perimeterYdiameter, which seem to be swapping between English and spanish. Does that code actually compile and run?
If you defined those variables as Real, why are you using 3 instead of π?

[Bruno Valdeolmillos]

Campbell Ritchie wrote:What language is that?
Radius is defined in line 15 as a parameter to the area_circle() function. Are you using that function? You appear to have all sorts of different spellings, rad and RAD, perimeterAnddiameter and perimeterYdiameter, which seem to be swapping between English and spanish. Does that code actually compile and run?
If you defined those variables as Real, why are you using 3 instead of π?

It is not a language, it is pseudocode. It is to learn programming logic.
The code works perfect. I defined it as real and then put 3 instead of the value of PI(3,14) to quickly check if the results were correct (so as not to use the calculator).
I did not know that the arguments could be defined after putting the function name. Anyway, it defines the radio variable after writing the function name but I don't know what data type it is. I assume that it is defined from the line 3

[Bruno Valdeolmillos]

Of course, my native language is Spanish and I translated it into English using google translator and it did not translate the conjunction "y" well, which in English is and. Sorry.

[Piet Souris]

hi Bruno,

Bruno wrote:SubProcess perimeterAnddiameter(rad By Value, perimeter By Reference, diameter By Reference)

That reminds me of Quick Basic, about 10_000 years ago!

But in Java, everything is passed by value, even if that value is a reference!

[Bruno Valdeolmillos]

Piet Souris wrote:hi Bruno,

Bruno wrote:SubProcess perimeterAnddiameter(rad By Value, perimeter By Reference, diameter By Reference)

That reminds me of Quick Basic, about 10_000 years ago!

But in Java, everything is passed by value, even if that value is a reference!

that is, it does not exist by reference in Java??
I am still trying to understand the difference between by value and by reference, in addition to its usefulness (I was told that it is used to make a copy, "backup" style) Supposedly by value it does not return values to the main algorithm... I will seek.