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Define a rational type, to operate with rational numbers
and implement the following operations:
rational zero ();
rational fixa (int num, int den);
int numerator ();
int denominator ();
rational sum (rational q1, rational q2);
rational sub (rational q1, rational q2);
rational mul (rational q1, rational q2);
rational div (rational q1, rational q2);
double real (rational q);
void print (rational q);
Observation
You only need to submit the required procedure;
your main program will be ignored.