different between Local variable and Global variable

I'm having a class with lots of variables, and each one has a set get method.
Its actually not very important but I hate having too much names in a class.

For example i have a method that require a parameter var1, and the name var1
already used by the global variable. In java we can access both by using
this.var1 for global variable and var1 for local variable.

Is it possible to do the same in C++? How can I do it?

This should be possible by using the scope resolution (::) operator to
access the global variable.