how to avoid array subscript problem, unknown size

[nevetta]

cout<< "Insert the maximum number of hops of the routing algorithm used  :";
  cin>> num_of_hops;
  cout << endl << "number of paths : " << num_of_paths << endl;
int path_matrix[][];
 path_matrix[num_of_paths][num_of_hops + 1];
float path_length[];  // The total length of each path
 path_length[num_of_paths];

error C2057: expected constant expression
error C2466: cannot allocate an array of constant size 0
error C2133: 'a' : unknown size
error C2057: expected constant expression
error C2466: cannot allocate an array of constant size 0

[Anas Mosaad]

Why don't you use pointers instead? I'm not sure if there's away to define a static array dimensions at runtime in C++ -at least I don't know how.

Alternatively, you may use vector http://www.cplusplus.com/reference/v...vector/vector/

[whodgson]

Could you create the array dynamically at run time using new and delete?

[weaknessforcats]

Read this: http://bytes.com/topic/c/insights/77...rrays-revealed.

You are not following some of the rules for arrays.