Please help

[rajeevktripathi]

Hi How to change associativity of operators in C++, e.g. if we have int a = 15; int b = 5; int c = a---b; then compiler interpret this expression as int c = (a--) - b; what I want, is like int c = a -(--b); is there any way to achieve this. Please suggest me. Thanks & Regards

[nbugalia]

Use proper parenthesis in your code.

[baerten]

I don't think so. Because the compiler doesn't know your minds. All automatic parsing is defined by rules. Like mathematics, if you calculate 5+5*6 you should begin with 5*6 and then + 5 if you specifie it (5+5)*6 you start with adding 5+5 then the *6 It's the same in programmation. :)

[rajeevktripathi]

Hi thanks for your replies Is there any prgma option to do this please suggest me Thans & regards

[nbugalia]

rajeevktripathi wrote:

Is there any prgma option to do this

I didn't found any.

[jhwurmbach]

rajeevktripathi wrote:

Is there any prgma option to do this

No. There is no need for that. You write the parenthesis in your code where you need them. When in doubt, add a pair of parenthesis. Extra pairs of parenthesis won't do any harm.

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[toxcct]

rajeevktripathi wrote:

How to change associativity of operators in C++,

changing associativity is like changing the meaning of things (so, changing the language itself), so, no way at all. moreover, if associativity exists like it is, there are reasons over the problem you can have with it.

rajeevktripathi wrote:

then compiler interpret this expression as int c = (a--) - b; what I want, is like int c = a -(--b);

then, why don't you just use spaces (or at least, parenthises like someone said) ? write c = a - --b; and everything will be good.

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[toxcct]

NishantB++ wrote:

I didn't found any.

of course you didn't, 'cause there aren't any ! this feature is a fundamental of the language itself !!!

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[toxcct]

jhwurmbach wrote:

Extra pairs of parenthesis won't do any harm

no need. one pair is largely sufficient, because it can be countered with simple spaces...

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[David Crow]

rajeevktripathi wrote:

is there any way to achieve this.

Why make things harder than necessary:

int a = 15;
int b = 5;
a--;
--b;
int c = a-b;

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