Academic Integrity: tutoring, explanations, and feedback — we don’t complete graded work or submit on a student’s behalf.

C++ Does operator< depend on any other user-defined functions? If so, which ones

ID: 3927945 • Letter: C

Question

C++

Does operator< depend on any other user-defined functions? If so, which ones?

bool vnl_decnum::operator< (vnl_decnum const& r) const
{
#ifdef DEBUG
std::cerr << "Entering vnl_decnum::operator< with " << data_ << " and " << r.data() << ' ';
#endif
std::string rs = r.data();
if (data_ == "NaN" || rs == "NaN") return false; // NaN compares to nothing!
else if (operator==(r)) return false;
else if (data_ == "Inf") return sign_ == '-';
else if (rs == "Inf") return r.sign() == '+';

if (sign_=='-' && r.sign() == '-') return -r < operator-();
else if (sign_=='-') return true;
else if (r.sign() == '-') return false;
else if (sign_==' ') return true;
else if (r.sign() == ' ') return false;
else if (data_.length()+exp_ < rs.length()+r.exp()) return true;
else if (data_.length()+exp_ > rs.length()+r.exp()) return false;
else // at this point, the orders of magnitude are the same
return comp(data_,rs);
}

bool vnl_decnum::operator< (vnl_decnum const& r) const
{
#ifdef DEBUG
std::cerr << "Entering vnl_decnum::operator< with " << data_ << " and " << r.data() << ' ';
#endif
std::string rs = r.data();
if (data_ == "NaN" || rs == "NaN") return false; // NaN compares to nothing!
else if (operator==(r)) return false;
else if (data_ == "Inf") return sign_ == '-';
else if (rs == "Inf") return r.sign() == '+';

if (sign_=='-' && r.sign() == '-') return -r < operator-();
else if (sign_=='-') return true;
else if (r.sign() == '-') return false;
else if (sign_==' ') return true;
else if (r.sign() == ' ') return false;
else if (data_.length()+exp_ < rs.length()+r.exp()) return true;
else if (data_.length()+exp_ > rs.length()+r.exp()) return false;
else // at this point, the orders of magnitude are the same
return comp(data_,rs);
}

Explanation / Answer

< symbols depend on

1)length() and

2)exp() functions

comparison is done between these functions

Hire Me For All Your Tutoring Needs
Integrity-first tutoring: clear explanations, guidance, and feedback.
Drop an Email at
drjack9650@gmail.com
Chat Now And Get Quote