calculate the probabilities that a group of n people will have at least two people within that share the same birthday.

BirthdayParadox.cpp

double CurProb = 1;
std::cout << 1 << ": " << 0.0 << std::endl;
for (int i = 1; i < 100; i++)
{
    double bp = (365.0 - (double)i) / 365.0;
    CurProb *= bp;
    std::cout << (i + 1) << ": " << (1.0 - CurProb) << std::endl;
}