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AnubisProgrammer

Fri Mar 17, 2006 10:51 am


User defined arrays?

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I'm writing a program for class, and I'm trying to make an array, but the array has to be defined by the user.  So I tried making it like this:

int array

then defined "n" later in a user input.  Apparently that doesn't work.  I get three errors:

error C2057: expected constant expression
error C2466: cannot allocate an array of constant size 0
error C2133: 'number' : unknown size

How can I make it so the user defines the size of the array?


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md

Fri Mar 17, 2006 11:13 am



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you can do it rather easily with malloc/new (depending on C/C++). But seeing as dynamic memory allocation is usually not taught at all; or if it is not until the very end of the year I'm guessing this is one of those cases where you are given a maximum size of some kind. That was you can just declate the really big array and have another varaible to keep track of the upper bound.


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wtd

Fri Mar 17, 2006 11:28 am



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int array_size;

cout > array_size;

int *array = new int


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AnubisProgrammer

Mon Mar 20, 2006 3:05 pm



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Yup yup, that worked nicely.  Thanks!