Why is this constructor not "exectued"?

Projects Programming
1

In the following I define an object "foo" by just writing "Foo foo();" in the "root of the file" (what I mean is: not inside a function). Is there a nice word/term for this kind of initialization, as opposed to initializing an object within a function?

It seems like the constructor is just never called. Is it ever called then? Or should I do something more to initialize the "foo" object?

As the code demonstrates, the constructor IS called when initializing objects of class Foo inside a function.

int count = 0;

class Foo
{
public:   
   Foo ();
};

Foo::Foo() {
  count ++;
}

Foo foo(); // initialize one

void setup() {
  Serial.begin(9600);
  while(!Serial);
}

// the loop routine runs over and over again forever:
void loop() {
  Serial.println(count);
  Foo();
  delay(1000);
}

Please correct me if I am using the terms initialization/declaration/construction wrong.

Sincerely

2

Your initialization is wrong.

Use

Foo foo; // really initialize one
3

Like he said. When you say:Foo foo();
you are declaring a function named 'foo' that returns a value of type 'Foo'. It's the parentheses that make it a function declaration.

4

Whooaaa,,, aahhhh,,, not sure how to react. Thanks a lot :slight_smile: