You can try something like this int func1() { return 0; } int func2() { return 0; } typedef int (*funcptr)(); struct condition { int low; int high; funcptr func; }; condition arr[] = { { 10, 20, func1 }, { 20, 30, func2 } // Can add more data here }; int n=17; for (int i=0;i<2;++i) { if (n > arr[i].low && n < arr[i].high) { arr[i].func(); // If you want you can break here } } -Arun

This seems to be compilation error because of not including correct header files. Try including the required header files in stdafx.h

Consider this Example class Base { }; class Derived: public Base { }; Consider this Base *b = new Base() This means we need to create a Base object we are really not worried on who has derived from Base. Consider this Derived *d = new Derived(); or Base *b = new Derived(); This mean we want a derived object and by default the base class constructor is called before the Derived. So there is no use of virtual constructors. -Arun