operator [] method
Access the whole part, the numerator or the denominator of the fraction via index. In particular:
0
refers to the whole part;1
refers to the numerator;2
refers to the denominator.
Any other value which is not 0
, 1
or 2
will throw an exception of
MixedFractionException type.
Implementation
int operator [](int index) {
switch (index) {
case 0:
return whole;
case 1:
return numerator;
case 2:
return denominator;
default:
throw MixedFractionException(
'The index ($index) is not valid: it must either be 0, 1 or 2.',
);
}
}