C ++删除函数中的局部变量

Question

I have function that works on class A. Class A allocates some memory in constructor and frees it in destructor A::~A().

Now what if.

A someFunc()
{
//This is just to illustrate that it is possible for that variable to be overwritten few times before returning.

A locA;

for(some condition)
{
    //Something something
    A forA(i);
    //Something.
    if(end) locA = forAj;
}

return locA;
}

Is this good? Is destructor of that class called every time it created again in that for loop?

Answer 1

Is destructor of that class called every time it created again in that for loop?

Yes, the variables have automatic storage so A 's destructor is called each time one of them goes out of scope.

Provided your class is well behaved, memory allocated in A should get dealt with appropriately. Note that this means that in your case, A should also have a suitable copy constructor and a copy assignment operator in order to be well behaved.

For more on that last point see the rule of three .