What are the differences between function overloading and templates in C++?
Function overloading allows multiple functions with the same name but different parameters, while templates enable generic programming by allowing functions and classes to operate with any data type.
Which one is better for performance?
It depends on the context. Overloading can be more straightforward and may have less overhead, while templates can lead to more optimized code through compile-time polymorphism.
Can you give an example of each?
Sure! For overloading, you might have two functions: void print(int)
and void print(double)
. For templates, you could use template <typename T> void print(T value) { ... }
to handle any type.
Are there any downsides to using templates?
Yes, templates can lead to code bloat due to multiple instantiations and can make compilation slower. They also can be harder to debug.
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