How to avoid memory leak when user press ctrl+c under linux?

Question

In my program written with C and C++, I will new an object to fulfill the task, then delete the object.

At the moment after new object but before delete object, if t

Answer 1

In a virtual-memory-based system, all memory is returned to the OS when a process is terminated, regardless of whether it was freed explicitly in the application code. The same might not be true of other resources, however, which you may want to free cleanly. In which case, you need to provide a custom signal handler for the SIGINT signal (which is received on Ctrl+C), see e.g. http://linux.die.net/man/2/sigaction.