C++ Memory Leak Using STL Containers

Question

The following code is giving me a memory leak (using Visual Studio):

#define _CRTDBG_MAP_ALLOC
#include 
#include 
#include &         


        

Answer 1

std::vector listeners; will not free the members of Listeners. You'd have to delete each of the listeners that are inside the vector, using something like:

for (int i = 0; i < listeners.size(); i++) delete listeners[i]

Personally, I avoid such issues by using smart pointers:

std::vector> listeners

_CrtDumpMemoryLeaks detects leaks by counting news and making sure they all match. Because subject never goes out of scope, I'm guessing it is counted as an outstanding reference. Try int main(void) {{Subject subject;}_CrtDumpMemoryLeaks(); return 1}