What is the code to delete variables that are dynamically allocated?

Answer 1

In C++, dynamically allocated variables are best encapsulated in a class. In this way, the variable is automatically deleted when the object falls from scope.

#include<iostream>

class f ()

{

int* p;

public:

f (const int i=0): p {new int{i}} {}

f (const& f other): p {new int{*other.p;}} {}

~f() {delete p; }

f& operator=(const f& other) { *p = *other.p; }

f& operator= (const int i) {*p=i;}

operator int () { return *p; }

};

int main()

{

{

f value = 42;

// use value...

}

// f automatically falls from scope here, releasing the memory allocated to value.p

}