why function pointers and call back ?

bhadmanathan · Jun 1, 2016

I read the tutorial about function pointer. I understood the syntax and concept. But..

Code C - [expand]
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void A()
    {
        printf("HELLO");
    }
    void B(void (*p)())
    {
         p();
    }
    main()
    {
          B(A);      or       A();
    }

Instead of calling a function indirectly, we can simply call like A();

Is there anything in terms of memory....?

Thanks in advance

enren · Jun 13, 2016

Example widely used for data reception:
A is the callback function executed by an interruption.
B enable this interruption at the beginning.

AdityaRajNayak · Jun 13, 2016

Hi,
Just gone through following link for 'advantages of function pointers' which can be helpful.
https://www.allinterview.com/showanswers/28663/what-is-the-advantage-of-function-pointer.html

why function pointers and call back ?

bhadmanathan

Junior Member level 1

enren

Newbie level 6

AdityaRajNayak

Junior Member level 1

Similar threads

Code C - [expand]
1 2 3 4 5 6 7 8 9 10 11 12	void A() { printf("HELLO"); } void B(void (*p)()) { p(); } main() { B(A); or A(); }

why function pointers and call back ?

bhadmanathan

Junior Member level 1

enren

Newbie level 6

AdityaRajNayak

Junior Member level 1

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