double Combination(double n, double r)
{
double ans = 0;
double divide = n - r;
if (!(divide < 0))
{
ans = (DMASSolver.Factorial(n) / (DMASSolver.Factorial(r) * DMASSolver.Factorial(n - r)));
}
else
{
processError = true;
ans = 0;
}
return(ans);
}
//Operations
double Permutation(double n, double r)
{
double ans = 0;
double divide = n - r;
if (!(divide <= 0))
{
ans = DMASSolver.Factorial(n) / DMASSolver.Factorial(divide);
}
else if (divide == 0)
{
ans = DMASSolver.Factorial(n) / 1;
}
else
{
processError = true;
ans = 0;
}
return(ans);
}