What can be wrong at 21 test?Using c++,double types and rounding with int(double k).

round using (int)(x + 0.5) where x is double

What is wrong in the test #21.Anyone help me.

Do you know that real numbers cannnot be compared
sush way: r1=r2.
Insead it is necessaryto write: abs(r1-r2)<0.000001;