Pass array with all elements zero (C++)

Question

There is a function:

void fnc (T arg[]) {

    // inside the function there is something like this:
    // A = B + arg[index] * C;
}

In some situations, there is nothing to pass so, arg[] should be zero. So, is there a way to call function as this way: void fnc(0);?

passing an array with all elements 0 is not the same as passing a reference to an empty array. — Maggie
– Maggie, Commented Feb 18, 2012 at 17:19
So, what do you really want - pass array with all elements = 0 or pass empty array? — Torsten
– Torsten, Commented Feb 18, 2012 at 17:56

Mr.Anubis · Accepted Answer · 2012-02-18 17:22:56Z

4

In that case you can call function will null value e.g : fnc (NULL); . But make sure to check in function whether arg == NULL or not before using it.

P.s: Best thing is to use std::vector instead of simple array.

edited Feb 18, 2012 at 17:22

answered Feb 18, 2012 at 17:16

Mr.Anubis

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3 Comments

Ben Ruijl Over a year ago

Did you change the function argument to T* arg and are you really checking for the case arg==NULL?

Mr.Anubis Over a year ago

@Shibli check this: ideone.com/GDUCz, you can pass NULL or 0 ,since NULL is macro defined 0, What compiler you're using?

Shibli Over a year ago

@Mr.Anubis: I have checked the link. Compiler is Intel.

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