Variadic Functions

Despite appearances, default parameter values do not change the number of parameters that a function receives. For example, even though some parameters may be assigned their default values, the printAA() function always takes four parameters and uses them according to its implementation:

void printAA(string title, 
             string[string] aa,
             string keySeparator = ": ",
             string elementSeparator = ", ")

On the other hand, variadic functions can be called with an unspecified number of arguments. We have already been taking ...