4.1. Alternative Implementations Of Fractions
Returning
to our example of the fraction data type, how might we
actually implement this datatype in C?
Implementation 1
typedef struct { int numerator,denominator; } fraction;
main()
{
fraction f;
f.numerator = 1;
f.denominator = 2;
...
}
Implementation 2
#define numerator 0
#define denominator 1
typedef int fraction[2];
main()
{
fraction f;
f[numerator] = 1;
f[denominator] = 2;
...
}
These
are just 2 of many different possibilities. Obviously, these differences are in
some sense extremely trivial - they do not affect the domain of values or
meaning of the operations of fractions.
