Neither snippet you show is idiomatic, modern C++ code. new and delete (and new[] and delete[]) are not deprecated in C++ and never will be. They are still the way to instantiate dynamically allocated objects. However, as you have to always match a new with a delete (and a new[] with a delete[]), they are … Read more
Static arrays are created on the stack, and have automatic storage duration: you don’t need to manually manage memory, but they get destroyed when the function they’re in ends. They necessarily have a fixed size at compile time: int foo[10]; Arrays created with operator new[] have dynamic storage duration and are stored on the heap … Read more
This is a standard interview question: Dynamic memory allocation Is memory allocated at runtime using calloc(), malloc() and friends. It is sometimes also referred to as ‘heap’ memory, although it has nothing to do with the heap data-structure ref. int * a = malloc(sizeof(int)); Heap memory is persistent until free() is called. In other words, … Read more