C + + string

1 allocation and recycling of memory for string objects

If the string is short, then the memory is allocated on the stack. If the string is long, allocate memory on the heap.

At the end of the string life cycle, the destructor of string is automatically called to free memory.

2 string object as formal parameter of function

This time the copy constructor is implicitly called, the argument object is copied, and a new object is created.

3 String Object as the return value of a function

Implicitly call the copy constructor, create a new object, and pass it back so that the memory on the stack is freed.

4 copy constructor when a new string object is created, will the string itself be copied one copy?

Will, each string object has its own string space, otherwise it is inconvenient to edit.

C + + string