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Detalii evaluare #64301062
Rezumat problemă
#1625
Se citesc de la tastatura 3 valori reale a, b , c. Rezolvați ecuația de gradul doi cu a*x2+b*x+c=0
Circeie Gabi (Gabi_Circeie) Detalii
| Problema | ec2 | Operații I/O |
 tastatură/ecran
|
|---|---|---|---|
| Limita timp | 0.1 secunde | Limita memorie |
Total: 64 MB
/
Stivă 8 MB
|
| Id soluție | #64301062 | Utilizator |
Ruse Eduard Bogdan (Edi64)
|
| Fișier | ec2.cpp | Dimensiune | 541 B |
| Data încărcării | 28 Aprilie 2026, 16:54 | Scor/rezultat | Eroare de compilare |
Evaluare
Mesaj compilare
ec2.cpp: In function ‘int main()’: ec2.cpp:9:5: error: ‘delta’ was not declared in this scope 9 | delta=b*b-4*a*c; | ^~~~~ ec2.cpp:16:38: error: no match for ‘operator<<’ (operand types are ‘std::_Setprecision’ and ‘const char [16]’) 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~ | | | | | const char [16] | std::_Setprecision In file included from /usr/include/c++/13/string:54, from /usr/include/c++/13/bits/locale_classes.h:40, from /usr/include/c++/13/bits/ios_base.h:41, from /usr/include/c++/13/ios:44, from /usr/include/c++/13/ostream:40, from /usr/include/c++/13/iostream:41, from ec2.cpp:1: /usr/include/c++/13/bits/basic_string.h:4032:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’ 4032 | operator<<(basic_ostream<_CharT, _Traits>& __os, | ^~~~~~~~ /usr/include/c++/13/bits/basic_string.h:4032:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ In file included from /usr/include/c++/13/bits/ios_base.h:46: /usr/include/c++/13/system_error:339:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const error_code&)’ 339 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e) | ^~~~~~~~ /usr/include/c++/13/system_error:339:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:554:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _CharT)’ 554 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c) | ^~~~~~~~ /usr/include/c++/13/ostream:554:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:564:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, char)’ 564 | operator<<(basic_ostream<_CharT, _Traits>& __out, char __c) | ^~~~~~~~ /usr/include/c++/13/ostream:564:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:570:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, char)’ 570 | operator<<(basic_ostream<char, _Traits>& __out, char __c) | ^~~~~~~~ /usr/include/c++/13/ostream:570:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<char, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:581:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, signed char)’ 581 | operator<<(basic_ostream<char, _Traits>& __out, signed char __c) | ^~~~~~~~ /usr/include/c++/13/ostream:581:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<char, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:586:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, unsigned char)’ 586 | operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c) | ^~~~~~~~ /usr/include/c++/13/ostream:586:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<char, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:645:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const _CharT*)’ 645 | operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s) | ^~~~~~~~ /usr/include/c++/13/ostream:645:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ In file included from /usr/include/c++/13/ostream:880: /usr/include/c++/13/bits/ostream.tcc:307:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, const char*)’ 307 | operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s) | ^~~~~~~~ /usr/include/c++/13/bits/ostream.tcc:307:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:662:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const char*)’ 662 | operator<<(basic_ostream<char, _Traits>& __out, const char* __s) | ^~~~~~~~ /usr/include/c++/13/ostream:662:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<char, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:675:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const signed char*)’ 675 | operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s) | ^~~~~~~~ /usr/include/c++/13/ostream:675:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<char, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:680:5: note: candidate: ‘template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(basic_ostream<char, _Traits>&, const unsigned char*)’ 680 | operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s) | ^~~~~~~~ /usr/include/c++/13/ostream:680:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<char, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:801:5: note: candidate: ‘template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&)’ 801 | operator<<(_Ostream&& __os, const _Tp& __x) | ^~~~~~~~ /usr/include/c++/13/ostream:801:5: note: template argument deduction/substitution failed: /usr/include/c++/13/ostream: In substitution of ‘template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::_Setprecision; _Tp = char [16]]’: ec2.cpp:16:40: required from here /usr/include/c++/13/ostream:801:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’ In file included from ec2.cpp:3: /usr/include/c++/13/iomanip:81:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Resetiosflags)’ 81 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f) | ^~~~~~~~ /usr/include/c++/13/iomanip:81:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/iomanip:111:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setiosflags)’ 111 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f) | ^~~~~~~~ /usr/include/c++/13/iomanip:111:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/iomanip:145:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setbase)’ 145 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f) | ^~~~~~~~ /usr/include/c++/13/iomanip:145:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/iomanip:180:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setfill<_CharT>)’ 180 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f) | ^~~~~~~~ /usr/include/c++/13/iomanip:180:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/iomanip:210:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setprecision)’ 210 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f) | ^~~~~~~~ /usr/include/c++/13/iomanip:210:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/iomanip:240:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Setw)’ 240 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f) | ^~~~~~~~ /usr/include/c++/13/iomanip:240:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/iomanip:313:5: note: candidate: ‘template<class _CharT, class _Traits, class _MoneyT> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Put_money<_MoneyT>)’ 313 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f) | ^~~~~~~~ /usr/include/c++/13/iomanip:313:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~ /usr/include/c++/13/iomanip:365:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(basic_ostream<_CharT, _Traits>&, _Put_time<_CharT>)’ 365 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_time<_CharT> __f) | ^~~~~~~~ /usr/include/c++/13/iomanip:365:5: note: template argument deduction/substitution failed: ec2.cpp:16:40: note: ‘std::_Setprecision’ is not derived from ‘std::basic_ostream<_CharT, _Traits>’ 16 | cout <<fixed< setprecision(2)<<"Radacina dubla "<<(-b)/(2.0*a); | ^~~~~~~~~~~~~~~~~
Cum funcționează evaluarea?
www.pbinfo.ro permite evaluarea a două tipuri de probleme:
- probleme la care rezolvarea presupune scrierea unui program complet
- probleme la care rezolvarea presupune scrierea unei secvențe de program - câteva instrucțiuni, o listă de declarații, una sau mai multe funcții, etc.
Problema ec2 face parte din prima categorie. Soluția propusă de tine va fi evaluată astfel:
- Programul sursă este compilat folosind compilatorul corespunzător. Dacă în urma compilării se obțin erori sau avertismente, acestea sunt afișate în această pagină.
- Dacă programul a fost compilat, executabilul obținut va fi rulat, furnizându-i-se unul sau mai multe seturi de date de intrare, în concordanță cu restricțiile specifice problemei. Pentru fiecare set de date se obține un anumit punctaj, în raport cu corectitudinea soluției tale.
Suma punctajelor acordate pe testele utilizate pentru verificare este 100. Astfel, soluția ta poate obține cel mult 100 de puncte, caz în care se poate considera corectă.