"insertion and extraction operator overloading in c++" Code Answer's
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insertion and extraction operator overloading in c++
//<<<<<<<<<<<<<<<<<<<<<<<<<<<insertion operator overloading<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Amir Ammar
std::ostream& operator<<(std::ostream& out, const Bigint& i){
for(auto b = i.m_digits.begin(); b != i.m_digits.end(); ++b){
out<<(*b);
}
return (out);
}
//>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>extraction operator overloading>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Efi Fogel
std::istream& operator>>(std::istream& in, Bigint& i) {
char c;
in.get(c);
if (c == '-') i.m_is_negative = true;
else {
if (! std::isdigit(c)) throw std::runtime_error("Invalid input");
i.m_digits.emplace_front(c);
}
while (in.get(c) && (c != 0xa)) {
if (! std::isdigit(c)) throw std::runtime_error("Invalid input");
i.m_digits.emplace_front(c);
}
i.m_digits.reverse(); // additional method to return the reversed value (the real input)
while(i.m_digits.front()=='0'&&i.m_digits.size()!= 1){ // while loop to earse additional zeroes
i.m_digits.pop_front();
if(i.m_digits.size()== 1)
break;
}
return in;
}
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