class Rational
	begin
		instance
			int num, den;
			Rational init( int num, den; )
				begin
					this.num = num;
					this.den = den;
					return this;
				end
	end
void printRat( Rational r; ) 
	begin
		Rational s = r;
		println( s.num + "/" + s.den );
	end
real ratToReal( Rational r; ) 
	begin
		return ( r.num + 0.0 ) / r.den;
	end
Rational r;
r = new Rational.init( 3, 2 );
println( r.num + "/" + r.den );
printRat( r );
println( ratToReal( r ) );