Question

I have a code like:

class A{
public:
void method1 (){
// do something
}
};

class B{
public:
void method2 (){
// do something
}
};

main(int argc, char* argv[])
{
A a ;
a.method1();
// free object a
B b ;
b.method2();
}

Now, before creating b object, I want to free memory alocated by a. Can anybody help me how to do that ?

Answer 1

You just need to add additional scope {,} , Since a is a automatic/local object, it will be destroyed automagically once the scope in which it is declared ends.

main(int argc, char* argv[])
{
    {                    //<--------------
        A a ;
        a.method1();
    }                    //<-------------
    B b ;
   b.method2();
}

This is also popularly known as RAII in C++.