Memory Leak why

[Sarmadas]

there is memory leak in this program why and how i'll fix it i think i have to make the base class distructor a virtual distructor

class Base 
{ 
            char * p; 
public: 
            Base() { p = new char[10]; } 
 
            ~Base() { delete [] p; } 
}; 
class Derived : public Base 
{ 
            char * q; 
public: 
            Derived() { q = new char[20]; } 
 
            ~Derived() { delete [] q; } 
}; 
void foo() 
{ 
            Base* p = new Derived(); 
 
            delete p; 
} 

[kulkarnisr]

make the distructor as virtual..