How can I get an object from a vector, modify it and store it back ?

Hello all,
I have created the clase "node", this class has a "name" property and and "counter" property, and the associated method to set the name and make the couter increase value.
In a different class I have a vector, and I add "node" objects to this vector.
Once I've added a few objects "nodes" I need to get one, modify the value and the store it back in. Better if it is in the same position. ..
Thanks, alot guys. I could not copy an paste the code because I have a whole bunch of things mixed in the same code. I'd not be understanble.
Thanks again !!

Never mind, thanks anyway ..

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How can I get an object from a vector, modify it and store it back ?

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