[Sepanto]

Hi there!

Suppose I have a function void foo(int x, int y, int z);
and I write the next line

foo(x,++x,--x);

.

Is the line equivelent to

 
foo(x,x,x);

or to

foo(x,x+1,x-1);

?

Thanks in advance.

This post has been edited by Sepanto: 13 August 2008 - 08:59 AM

[NickDMax]

This is not defined in C/C++. Different compilers will evaluate this differently.

In general you should not use multiple the ++ and -- operators in the same line of code. You should never use multiple ++ -- operators on the same variable in the same line of code. The results will be unpredictable.

[Sepanto]

Thanks!!
And if I have the line

foo(++x,x,x);

is it equivallent to

foo(x+1,x,x);

or to

foo(x+1,x+1,x+1);

[NickDMax]

Again this is undefined. The order of evaluation of the parameters to a function are compiler specific (and actually sometimes optimization specific).