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How to create a user defined varible length array in ANSI C++?

Posted on 2006-06-28
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Last Modified: 2010-04-01
So,  this should be a real easy answer for a programming guru... worth 500 points.

How do you code a user defined varible length array in C++?

Please provide me with a code example...

(I'm not a programmer.)

Feel free to ask questions if I'm being unclear!

Thanks all!

Gerhard
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Question by:gerhardub
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3 Comments
 
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wayside earned 500 total points
ID: 17002128
1)

int length = 25; // get length from user somehow
int *pArray = new int[length];
for (int i=0; i<length; i++) {
   pArray[i] = i; // do something here
}

2) use the STL vector class, it handles all the size issues.

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Expert Comment

by:wayside
ID: 17002524
Don't forget to

delete [] pArray;

when you are done with it or you create a memory leak.
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LVL 30

Expert Comment

by:Axter
ID: 17002700
Hi gerhardub,
FYI:
If you create the array with an empty bracket (), the array gets initialized to zero.
Example:
int *pArray = new int[length]();


David Maisonave (Axter)
Cheers!
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