how to define an dynamic int-array

[mokesql]

hi!

i wanna define a int-array which size should be typed in by the user. so i want to define the array dynamicly. i tried
cin << n;
int x[n][n];

but it doesnt work. i get the error: constatn expression required in the definition line of x. i once have had the same problem but i dont know how i solved it back then. please help me as soon as possible. thnx

moke

 

[mbaranski]

Uh, use alloc. if you're going to define an array, you have to do it at compile time. What you have to do is use a pointer to an array and use (m)alloc(...) to set it up at run time.

Mike.
Disclaimer:
Beware: Studies have shown that research causes cancer in lab rats.

 

[2ffat]

You might also want to look the standard library vector and its cousins. James P. Cottingham

I am the Unknown lead by the Unknowing.
I have done so much with so little
for so long that I am now qualified
to do anything with nothing.

 

[Guest_imported]

First, sorry for my English...
You must to allocate memory using malloc (in C) or new in (C++). As you want to define a bidimensional array you could make:

int **i, n , k;

cin >> n;
i=(int **)new int [n];
for (k=0; k<n; k++)
i[k]=(int *)new int [n];

and when the program finish, you must free memory:

for (k=0; k<n; k++)
delete i[k];