i understand when you use memory on the heap, your program allocates new memory to it to be used...the stack is preallocated memory and when u put a local variable on the stack, and the variables goes out of scope/dies, it technically still stays in memory until you overwrite the previous value correct?
int x = 3;
when variable x goes out of scope, it's value remains in memory correct? we just loose access/the pointer to it! correct?
think about the same situation but we use the heap. if i allocate new memory dynamically in my program using the heap, then later delete the memory location in the pointer, is the memory freed back to the O/S and the value still remain in that memory block that was used? or is it wiped clean when it is restored back to the O/S for use? hope this wasnt confusing and thanks alot!