Question

Today, I found out that you can write such code in C++ and compile it:

int* ptr = new int(5, 6);

What is the purpose of this? I know of course the dynamic new int(5) thing, but here i’m lost. Any clues?

Answer 1

You are using the comma operator, it evaluates to only one value (the rightmost).

The comma operator (,) is used to
separate two or more expressions that
are included where only one expression
is expected. When the set of
expressions has to be evaluated for a
value, only the rightmost expression
is considered.

Source

The memory address that the pointer is pointing to is initialized with a value of 6 above.