I am creating a program and while dynamically allocating an integer array, i try to delete the array from the heap in the same function I create it in. But valgrind is saying there are 20 bytes definitely lost/in use at exit. Here is the function: int whoStarts(Parent* parents, int num){ int* connects = new… Read More Why is this a memory leak from valgrind?

I wanted to reinvent the wheel(reference counting smart pointer) and i am not sure how to properly free the memory leaked with Box::into_raw() , once the references go to zero i don’t know how to efficiently free the memory that is being pointed I originally went with impl<T> Drop for SafePtr<T>{ fn drop(&mut self) {… Read More Rust, how do i correctly free heap allocated memory?

I have the following piece of code { let mut a = String::from("Foo"); a = String::from("Bar"); } I’m wondering when will the first String be freed is it when I assign a to a different String ? or is it when the scope ends ? >Solution : You can easily test this: struct B {… Read More Rust mutable variable and String

I am a noob trying to improve at pointers in C. I have declared a ptr to ptr variable strarray, dynamically allocated the memory without even typecasting to (char *) and assigned a string to ptr to ptr variable instead of pointer, but programs gives output "ddddd" how does it works //array of string #include<stdio.h>… Read More Why this program works?

I was reading this question, and here the jsoncpp CharReaderBuilder::newCharReader() function returns a pointer to a dynamically created CharReader object, which can then be used to parse a JSON. I understand in that question the OP should have freed the returned pointer once it was used, since it was created on the heap. But, I… Read More Will there still be a memory leak if I don't store the returned ptr?

When I declare a variable int b; what actually happens in the backend? Would it translate to int* b = malloc(sizeof(int)), just that it will be bound by a scope? I understand that a variable on the stack is bound by a scope and the heap is not necessarily bound by a scope, but on… Read More What happens in the backend when you initialize a variable on the stack in C?