Declaring global variables

[dn6326]

hi, essentially, my program needs to store an array of lists so that in main() it can have 2 run modes from the command line.

i.e. i can run the program with

./matrix load filename

to load a matrix into my array of lists
then use

./matrix find 1 3

to do something to the matrix I have just made (which is an array of lists)

i was going to create a global variable which was an array of lists but i need to know the size of it to declare it that way and I only know the size by running ./matrix load filename

Any ideas on how to go about this or other ways around it?

Cheers, Dan

P.S Dont ask why I am using an array of lists (but its pretty important that i do it that way)

[gpraghuram]

hi, essentially, my program needs to store an array of lists so that in main() it can have 2 run modes from the command line.

i.e. i can run the program with

./matrix load filename

to load a matrix into my array of lists
then use

./matrix find 1 3

to do something to the matrix I have just made (which is an array of lists)

i was going to create a global variable which was an array of lists but i need to know the size of it to declare it that way and I only know the size by running ./matrix load filename

Any ideas on how to go about this or other ways around it?

Cheers, Dan

P.S Dont ask why I am using an array of lists (but its pretty important that i do it that way)

Hi,
i assume that you are asking the way how to declare the list array.

typedef list<int> Int_List;
Int_List *list_arr;
 

The above piece helps you to acjieve the same

Thanks
Raghuram

[Laharl]

An array of lists would be a list<int>[], or for easier use, a vector<list<int>.

[gpraghuram]

An array of lists would be a list<int>[], or for easier use, a vector<list<int>.

What you say is right.
Since he has tole that he has to use array and the sie will be determined at run-time i went for this approach

Raghuram