if p and q are two rational nmbr and i m adding these nmbrs

Question

then what this statements denotes?
Rational r=(Rational) n;
int p=this.p*r.q+this.q*r.p;
int q= this.q*r.q;
return new rational(p,q);
plz tell me the complete description of it..!

Answer 1

Your code seems to use a class Rational ( in the 5th line, didn't you need a 'R' capitalized? ), which as two properties 'p' and 'q' where:

Rational r = new Rational(p,q); // r = p/q

Guessing that yur code sample go in a method of the class Rational, the code calculate the sum of the actual/current ( this ) Rational object with another ( 'r' in your example ), and return a new Rational(P,Q) where:

P = this.p * r.q and Q = this.q * r.q

... because:
( a/b ) + ( c/d )
<=> ( ( a*d ) / ( b*d ) ) + ( ( c*b ) / ( b*d ) )
<=> ( a*d + c*b ) / ( b*d )

Answer 2

hmmm..thanks :)