Question

I have a vector containing function pointers:

vector<double (*)(vector<double>)> dY = {d2x,d2y,dx,dy}

in another function, I have a for loop iterating over this vector.

for( vector<double>::const_iterator it = dY.begin(); it != dY.end(); ++it){
    vector<double> Y = {0,10,0,10};
    ...
}

Now I want to compute d2x(Y),d2y(Y),dx(Y) and dy(Y), but I fail to correclty cast the iterator, so that I can supply the arguments.

How can I do this?

Thanks a lot

Answer 1

Do you really iterate over the correct vector? The type of it in the loop doesn’t fit the dY vector.

for( vector<double (*)(vector<double>)>::const_iterator it = dY.begin(); it != dY.end(); ++it)
//          ^^^^^^^^^^^^^^^^^^^^^^^^^ -- You need the correct type here

Once you have a correct iterator, this should work:

double result = (*it)(Y);