What is the use of a function pointer in C?

Question

Accepted Answer

Function pointers in C are used to store the address of functions, allowing for dynamic function calls and callbacks.

Function pointers can be used to implement callbacks in event-driven programming.
They can be used to switch between different functions at runtime.
Function pointers are commonly used in implementing data structures like function pointers in an array of function pointers.
Example: void (*funcPtr)(int) = &someFunction; funcPtr(5);

Accepted Answer

Real time device driver example for function pointer: Layer1 : i2c_core
 Layer2 : bus controller driver 
Here Layer1 and Layer2 will communicate using function pointers. Here layer1 will expose header files which contains function pointers to layer2 then layer2 will fill the function pointers with there bus level API interfaces. so from layer1 will call layer2 API implementations with function pointers.

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