Note that a is not a pointer is an array. So when you subtract a pointer to an another pointer. The result is not really an address, It’s numbers of element between them. The type of the result is ptrdiff_t and you should print it with %td. So when you do &a[1] – &a[0], you … Read more
I follow some simple rules: don’t do manual memory allocations. If you find yourself writing a manual delete, stop and think twice. use std::string instead of C-style strings use std::vector<T> instead of C-arrays (or std::array<T> for fixed-sized arrays) use std::unique_ptr and std::make_unique by default use std::shared_ptr if necessary use RAII wrappers for other resources, e.g. … Read more
The stack is the memory set aside as scratch space for a thread of execution. When a function is called, a block is reserved on the top of the stack for local variables and some bookkeeping data. When that function returns, the block becomes unused and can be used the next time a function is … Read more