Declaring DoubleSolonoid

[RobHammann]

Thanks, they do declare now, however...

Originally Posted by one_each

For classes, use the -> operator to access methods and fields from the pointer.

I really don't understand these pointers, when I try to set the solenoids using something like

grabSolenoid.set(DoubleSolenoid::kForward);

it says "request for member 'set' in '(((Robot*)this))->Robot::grabSolenoid', which is of pointer type 'DoubleSolenoid' (maybe you meant to use '->' ?)"

where do I put the ->?

[Steve Warner]

Try grabSolenoid->Set(DoubleSolenoid::kForward);

[Alan Anderson]

Originally Posted by RobHammann

...using something like

grabSolenoid.set(DoubleSolenoid::kForward);

it says "request for member 'set' in '(((Robot*)this))->Robot::grabSolenoid', which is of pointer type 'DoubleSolenoid' (maybe you meant to use '->' ?)"

where do I put the ->?

You have declared grabSolenoid as a pointer to a double solenoid object. The member functions like Set() only work on an actual object. You need to dereference the pointer before you can call the function. The '->' is a small bit of syntax convenience that lets you dereference the pointer and do the equivalent of a '.' at the same time.

Just replace the '.' with '->' between the variable name and the function name.

[GeeTwo]

Originally Posted by Alan Anderson

Just replace the '.' with '->' between the variable name and the function name.

Yes. obj_ptr->elt is equivalent to (*obj_ptr).elt . That is, look up the actual field or method within the object that obj_ptr points to.