Yes, friend functions can be overloaded. Like other functions, the overloaded friend function must have a different parameter list, such as the Vector3D class in the example, which has an overloaded friend function operator () and operator-(), which allows addition and subtraction operators to be applied to Vector3D objects.
C The relationship between friend functions and overloading
Friend functions
Friend function is a special type of function that can access private members of other classes. In other words, it is not a member function of the class, but has the same access rights as a member function.
Define friend function:
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Overloading
Overloading allows creation of the same name but with the same name in the same scope Multiple functions with different parameter lists. This means that when an overloaded function is called, the compiler will determine which function to call based on the arguments.
Interaction between friend functions and overloading
Friend functions can be overloaded. Like other functions, overloaded friend functions must have different parameter lists.
Practical case
Example class:
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Overloaded friend function:
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Usage:
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In this example, we define a Vector3D
class and its overloaded friend function operator ()
and operator-()
. These friend functions allow us to use addition and subtraction operators on Vector3D
objects.
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