Stacks are a fixed size. Unless you are running out of stack space there is no point in “freeing” memory from the stack. Where in the stack the stack pointer po

Stacks are a fixed size. Unless you are running out of stack space there is no point in “freeing” memory from the stack. Where in the stack the stack pointer points has no bearing on stack size for any OS I’m aware of. I’m assuming by string you mean a stack allocated array of char and not a std::string.