Example

class MyClass {
public:
MyClass(){
MyClass::ptr = new int;
MyClass::ptr = 0;
}

~MyClass(){
delete ptr;
}

private:
int *ptr;
};

Solution

Declare the constructors and destructors in the class, but define them elsewhere to prevent them from being implicitely inline.

class MyClass {
public:
MyClass();
~MyClass();

private:
int *ptr;
};

MyClass::MyClass(){
MyClass::ptr = new int;
MyClass::ptr = 0;
}

MyClass::~MyClass(){
delete ptr;
}