C passes arguments by value and address. In C++ it is possible to pass arguments by value, address and refer-
ence. C++ reference types, declared with & operator are nearly identical but not exactly same to pointer types.
They declare aliases for object variables and allow the programmer to pass arguments by reference to functions.
The reference decelerator (&)can be used to declare references outside functions.
int k = 0;
int &kk = k; // kk is an alias for k
kk = 2; // same effect as k = 2
This creates the lvalue kk as an alias (assumed name) for k, provided that the initializer is the same type ...
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