why we need function pointers?

Question Posted / kirankumaryakkala

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why we need function pointers? ..

Answer / kirankumaryakkala

a pointer that holds the address of a function.
in writing the interrupt service routines(isr),memory virus
programs, etc..
as simply, if u wanna execute one function out of two or
more funcitons( the selection based dynamically)

ex. int add(int a, int b)
int sub(int a, int b)
int mul(int a, int b)

int (*ptr)(int a, int b) //function pointer declaration to
hold a function that takes two integers, returns one integer

here,
ptr= it can assign any function name that is going to execute

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why we need function pointers? ..

Answer / naman patidar

Apart from above mentioned usage function pointer are used
by event listeners and callback utilities in multi threaded
applications.

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why we need function pointers? ..

Answer / gajendra

Function Pointers are pointers, i.e. variables, which point to the address of a function. You must keep in mind,
that a running program gets a certain space in the main-memory. Both, the executable compiled program code
and the used variables, are put inside this memory.

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