Memory leaks persist after running a C ++ program in Visual Studio 2012?

I am not new to programming, but new to C ++. I think it’s better to learn when I play and interact with the language. So, one interesting thing I found is how Visual Studio can alert you to any memory leaks in your program with:

#define _CRTDBG_MAP_ALLOC
#include <stdlib.h>
#include <crtdbg.h> 

and then call

_CrtDumpMemoryLeaks();

before the program exits and prints all the memory leaks in the output window, amazing!

My questions

  • Do I need to restart Visual Studio 2012 after detecting a memory leak?
  • Do I need to restart my computer?
  • How long have these things been leaked? Or does Windows clear all memory at the end of execution? If this is true, is it true to run the program in "debug mode" in Visual Studio?

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