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Is this notation possible?

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Join Date: Sep 2004

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JoBe

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Is this notation possible?

Feb 14th, 2006

Hello ladies and gents,

There's an exercise, well, more a question that goes like this in Accelerated C++:

If the following code is legal, what can we infer about the return type of f?

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double d = f() [n];
double d = f() [n];

What I can gather is that the return type will be a double variable, but, I don't know wether this way of writing is actually correct?

Ive tried to use it, but failed in getting anything to work with this kind of function.

Could someone tell me wether this is a legal piece of code.

Thanks.

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Join Date: Apr 2004

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Dave Sinkula Dave Sinkula is offline

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long time no c

Re: Is this notation possible?

Feb 14th, 2006

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Originally Posted by JoBe

If the following code is legal, what can we infer about the return type of f?

That it returns a pointer to a double:

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double *f()
double *f()

Possible usage:

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#include <iostream>
 
double *f()
{
    static double value[] = {1,2,3,4,5};
    return value;
}
 
int main ( void )
{
    int n = 2;
    double d = f() [n];
    std::cout << "d = " << d << '\n';
    return 0;
}
 
/* my output
d = 3
*/
#include <iostream>

double *f()
{
    static double value[] = {1,2,3,4,5};
    return value;
}

int main ( void )
{
    int n = 2;
    double d = f() [n];
    std::cout << "d = " << d << '\n';
    return 0;
}

/* my output
d = 3
*/

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