How to put the value in dynamically in the constructor of class

[Man4ish]

Here i am creating a graph Network, it is working fine. But I am creating the Graph object by giving the parameter 40 which is (no of elements+1) in the graph.
How can i give it dynamically (should not write 40). It should take the output of function of (number_of_vertices()+1) function ,How can we do it .Please Help me out of this pblm.

Full code removed. Please 1) use code tags and 2) post the appropriate snippet of code (not full code)

[weaknessforcats]

Either use the initializer list or just call your function in your constructor.

Network::Network()
{
     this->verts = new Graph[(number_of_vertices()+1)];
}
//OR:
Network::Network() : verts(new Graph[(number_of_vertices()+1)]
{
}
 

Then put the cleanup code in your destructor.

BTW: I recommend using handles rather than pointers.

[Man4ish]

Either use the initializer list or just call your function in your constructor.

Network::Network()
{
     this->verts = new Graph[(number_of_vertices()+1)];
}
//OR:
Network::Network() : verts(new Graph[(number_of_vertices()+1)]
{
}
 

Then put the cleanup code in your destructor.

BTW: I recommend using handles rather than pointers.

When i am putting

Molecule::Molecule() : verts(new Graph[(number_of_vertices()+1)])
{

}
instead of this Molecule::Graph g(40); IT is giving following error.
||warning: command line option "-Wmain" is valid for C/ObjC but not for C++|
/home/manish/Desktop/Structure_Mining/com/Insilico/Create_Network/Network.cpp|47|error: definition of implicitly-declared ‘Molecule::Molecule()’|
||=== Build finished: 1 errors, 1 warnings ===|

[weaknessforcats]

Are you doing it this way:

int number_of_vertices()
{
         return 4;          //dummy
}
class Graph
{
 
};
class Molecule
{
     Graph* verts;
public:
     Molecule();
};
Molecule::Molecule() : verts(new Graph[(number_of_vertices()+1)])
{
 
}
int main()
{
   Molecule m;
}
 

This compiles and links usign Visual Studio.NET 2008.