14.2) Example: Statistical Analysis Program In A Single File

The program consists of four separate functions, as shown below. (Function contents are not relevant and are therefore elided.)

void read_data(ifstream& input, vector<double>& data)
{
  ...
}
double mean(const vector<double>& data)
{
  ...
}
double stdev(const vector<double>& data)
{
  ...
}
int main(int argc, char* argv[])
{
  ...
}