Hi ,
I have studies some material in google. But i confused by reading all those materials.
Actually any one can explain me the simple logic for Callback?
I know that callback means recruiting an Employee after layoff :-). How this meaning is related to "C" call back functions?
Use qsort to sort an array of integers. The comparison function that you use is a callback function.
Look up a C++ Reference and learn How To Ask Questions The Smart WayOriginally Posted by Bjarne Stroustrup (2000-10-14)
Hi light,
you mean to say qsort and comparison function both are executables. so a callback is a reference to executable code(comparison function executable code), that is passed as an argument to other code (qsort code) ?
am i correct?
Note:
1. from wikipedia "In computer programming, a callback is a reference to executable code, or a piece of executable code, that is passed as an argument to other code. This allows a lower-level software layer to call a subroutine (or function) defined in a higher-level layer."
Hi,
can any one give small example for the statement on callback as "A callback is often back on the level of the original caller" ?
I did not understand regarding that statement.
Thanks in advance.
We could say that all functions are executable, so: of course.
In this context, we could just say that a callback is a function that is passed as a function pointer argument to another function from which it is called.
In other words, the article claims that a callback is often defined in the same module as the original caller.
Look up a C++ Reference and learn How To Ask Questions The Smart Way
