well i wish to ennounce two global variables to use after in a function.
One variable i define as an unidimensional vector. I did it very well, i
think so, the variable is called x[].
But i wish to define a new global variable, as bidimensional dynamic array,
is called a[][]. But i don't know how to define this dynamic array a[][] as
global variable.

I knwo how to define dynamica array(unidimensional or bidimensional) inside
the main program or inside any function, but as a global variable?

It is important to remark that i have defined in my program three or more
functions whose one of incoming variables is a bidimeniosnal dynamic
array.

Next i post a part of program


Program :

they can be defined before headers, before using namespace, and it's the same
for all variables.
Something you might try is:

And it is before your loop. you can't put code out side of a function like that.