C++ Is it possible to leak memory if i'm not using dynamic memory

Question

None of my code uses dynamic memory, but I do have a vector of pointers to a struct called Node , and in my code, I do lose references to those Node s at one point. The struct looks like this:

struct Node {
int value;
Node* next;
};

I also have a for loop that tries to find the smallest value in my vector of Node pointers by taking the smallest Node off as I go. Here, lists is the vector of Node pointers, and add is the previous smallest value.

for (int i = 1; i < int(lists.size()); ++i) {
        if (lists[i]->value <= add) {
            add = lists[i]->value;
            lists[i] = lists[i]->next;
            break;
        }
    }

I thought I couldn't leak memory if I was just in the stack though...

Answer 1

If the Node referenced in the lists array is dynamically allocated, you should free all of them manually. Otherwise there will be memory leak. You can find more details on https://en.wikipedia.org/wiki/Memory_leak