Problems Expanding an Array in C++

Question

I\'m writing a simulation for class, and part of it involves the reproduction of organisms. My organisms are kept in an array, and I need to increase the size of the array when

Answer 1

Looks like you are modifying the pointer oldarray to point to the new array, but remember in the function that's just a copy and won't affect the variable you passed in. You probably need to pass a reference to a pointer if you want to do it this way.

And indeed, std::vector does this for you anyway

Answer 2

The C++ standard library already has functionality written to do this.

Use the std::vector container.

Answer 3

You need to pass oldarray as a reference: orgType *& oldarray. The way it's currently written, the function will delete the caller's array but will not give it the newly allocated one, causing the crash.

Better yet, use std::vector instead of reimplementing it.