IDEA: Template meta-programming
Template programming is quite a challenge.
Simple example: "Write a template struct that determines whether a number is even or odd"
Code:
template <int num, int mod2=-1>
struct Num
{
static const bool isOdd = Num<num,num%2>::isOdd;
};
template <int num>
struct Num<num,0>
{
static const bool isOdd = false;
};
template <int num>
struct Num<num,1>
{
static const bool isOdd = true;
};
//in main
cout << "45 is odd: " << Num<45>::isOdd;
The contest should be harder than that though.
