Constructor Syntax C++

Asked Oct 04 '16 at 21:39

Active Oct 04 '16 at 21:39

Viewed 28 times

private:
    int arrSize;
    int currentSize;
    int* arr;

ArrayClass::ArrayClass(int capacity)
    : arrSize{capacity},
      arr{new int[capacity]}
{
}

I came upon this code today, and it is completely new to me.

Is this the same as

ArrayClass::ArrayClass(int capacity){
    arrSize = capacity;
    arr = new int[capacity];
}

Is there an advantage between one or the other?

Also I did a little research and and saw that: arrSize{capacity} was just referring to the value of "capacity" arrSize(capacity) copies the value of "capacity"

Is there any other information I should know about?

asked Oct 04 '16 at 21:39

UnseededAndroid

1

No. They're not the same. Google "initializer list" and learn why to use them. – Edward Strange Oct 04 '16 at 21:40
is it `arrSize{capacity}` or `arrSize(capacity)`. I only know the second construct. – Jean-François Fabre Oct 04 '16 at 21:41
@Jean-FrançoisFabre, google list initialization. – bipll Oct 04 '16 at 21:43
but here they're the same since they're not lists. – Jean-François Fabre Oct 04 '16 at 21:45
I just googled initialization lists, and I've learned that initialization lists are better than assignment. – UnseededAndroid Oct 04 '16 at 21:56

Constructor Syntax C++

0 Answers0