c++/970: Function execution order problem when using return value of funtions as parameter to another function.

[skander@skander.com]

>Number:         970
>Category:       c++
>Synopsis:       Function execution order problem when using return value of funtions as parameter to another function.
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          support
>Submitter-Id:   net
>Arrival-Date:   Sun Dec 03 23:06:00 PST 2000
>Closed-Date:
>Last-Modified:
>Originator:     Kai Schutte
>Release:        gcc version 2.96 20000731 (Red Hat Linux 7.0)
>Organization:
>Environment:

>Description:
This is more of a standards question, but here goes...

This code:

int add_ten(int &num) { // changes num and returns 1.
  num+10;
  return 5;
}

void print(int num1, int num2, num3) {
  cout << num1 << " " << num2 << " " << num3 << endl;
}

int main () {
  int my_num = 10;
  print(0, add_ten(my_num), my_num);
  cout << my_num << endl;
}

should (IMHO) print out:
0 5 20
20

but instead prints:
0 5 10
20

I don't know if this is supposed to happen, and I don't
really know who to ask about this. Of course, it's easy
to change code so that this doesn't occur, but the real
question is how what this *should* print out... the 
add_ten function is of course executed first, yet it's
changes aren't reflected in the parameters...
>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: