Advanced C++ Topics

Exception Handling

How do you handle programmer errors when using a function or class?

Don't check the error condition and executing the code anyway, possibly causing a problem.

double future_value(double initial_balance, double p, int n)
{
   return initial_balance * pow(1 + p / 100, n);
}

Check the error condition and doing nothing if it occurs.

double future_value(double initial_balance, double p, int n)
{
   if (p < 0 || n < 0) return 0;
   return initial_balance * pow(1 + p / 100, n);
}

Check the error condition and alert the caller if it occurs.

double future_value(double initial_balance, double p, int n)
{
   assert(p >= 0 && n >= 0);
   return initial_balance * pow(1 + p / 100, n);
}