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Detalii evaluare #64802060
Rezumat problemă
#875
Să se scrie un program care gestionează o stivă de numere întregi. Inițial stiva este vidă. Programul va citi de la tastatură o listă de operații, care pot fi:
push X– adaugă valoarea întreagăXpe stivă;pop– elimină elementul din vârful stivei;top– afișează elementul din vârful stivei.
Programul va realiza asupra stivei operațiile citite, în ordine. Afișările se fac pe ecran, câte o valoare pe linie.
Candale Silviu (silviu) Detalii
| Problema | Stiva | Operații I/O |
 tastatură/ecran
|
|---|---|---|---|
| Limita timp | 0.1 secunde | Limita memorie |
Total: 64 MB
/
Stivă 8 MB
|
| Id soluție | #64802060 | Utilizator |
Daniel Gheoca (DanielGheoca)
|
| Fișier | stiva.cpp | Dimensiune | 694 B |
| Data încărcării | 02 Iunie 2026, 11:58 | Scor/rezultat | Eroare de compilare |
Evaluare
Mesaj compilare
stiva.cpp: In function ‘void top()’: stiva.cpp:13:15: error: return-statement with a value, in function returning ‘void’ [-fpermissive] 13 | return v[k]; | ~~~^ stiva.cpp: In function ‘int main()’: stiva.cpp:35:25: error: no match for ‘operator<<’ (operand types are ‘std::ostream’ {aka ‘std::basic_ostream<char>’} and ‘void’) 35 | cout<<top()<<endl; | ~~~~^~~~~~~ | | | | | void | std::ostream {aka std::basic_ostream<char>} In file included from /usr/include/c++/13/iostream:41, from stiva.cpp:1: /usr/include/c++/13/ostream:110:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(__ostream_type& (*)(__ostream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 110 | operator<<(__ostream_type& (*__pf)(__ostream_type&)) | ^~~~~~~~ /usr/include/c++/13/ostream:110:36: note: no known conversion for argument 1 from ‘void’ to ‘std::basic_ostream<char>::__ostream_type& (*)(std::basic_ostream<char>::__ostream_type&)’ {aka ‘std::basic_ostream<char>& (*)(std::basic_ostream<char>&)’} 110 | operator<<(__ostream_type& (*__pf)(__ostream_type&)) | ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:119:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(__ios_type& (*)(__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>; __ios_type = std::basic_ios<char>]’ 119 | operator<<(__ios_type& (*__pf)(__ios_type&)) | ^~~~~~~~ /usr/include/c++/13/ostream:119:32: note: no known conversion for argument 1 from ‘void’ to ‘std::basic_ostream<char>::__ios_type& (*)(std::basic_ostream<char>::__ios_type&)’ {aka ‘std::basic_ios<char>& (*)(std::basic_ios<char>&)’} 119 | operator<<(__ios_type& (*__pf)(__ios_type&)) | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:129:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 129 | operator<<(ios_base& (*__pf) (ios_base&)) | ^~~~~~~~ /usr/include/c++/13/ostream:129:30: note: no known conversion for argument 1 from ‘void’ to ‘std::ios_base& (*)(std::ios_base&)’ 129 | operator<<(ios_base& (*__pf) (ios_base&)) | ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~ /usr/include/c++/13/ostream:168:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long int) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 168 | operator<<(long __n) | ^~~~~~~~ /usr/include/c++/13/ostream:168:23: note: no known conversion for argument 1 from ‘void’ to ‘long int’ 168 | operator<<(long __n) | ~~~~~^~~ /usr/include/c++/13/ostream:172:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 172 | operator<<(unsigned long __n) | ^~~~~~~~ /usr/include/c++/13/ostream:172:32: note: no known conversion for argument 1 from ‘void’ to ‘long unsigned int’ 172 | operator<<(unsigned long __n) | ~~~~~~~~~~~~~~^~~ /usr/include/c++/13/ostream:176:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 176 | operator<<(bool __n) | ^~~~~~~~ /usr/include/c++/13/ostream:176:23: note: no known conversion for argument 1 from ‘void’ to ‘bool’ 176 | operator<<(bool __n) | ~~~~~^~~ In file included from /usr/include/c++/13/ostream:880: /usr/include/c++/13/bits/ostream.tcc:96:5: note: candidate: ‘std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int) [with _CharT = char; _Traits = std::char_traits<char>]’ 96 | basic_ostream<_CharT, _Traits>:: | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/13/bits/ostream.tcc:97:22: note: no known conversion for argument 1 from ‘void’ to ‘short int’ 97 | operator<<(short __n) | ~~~~~~^~~ /usr/include/c++/13/ostream:183:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(short unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 183 | operator<<(unsigned short __n) | ^~~~~~~~ /usr/include/c++/13/ostream:183:33: note: no known conversion for argument 1 from ‘void’ to ‘short unsigned int’ 183 | operator<<(unsigned short __n) | ~~~~~~~~~~~~~~~^~~ /usr/include/c++/13/bits/ostream.tcc:110:5: note: candidate: ‘std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char; _Traits = std::char_traits<char>]’ 110 | basic_ostream<_CharT, _Traits>:: | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/13/bits/ostream.tcc:111:20: note: no known conversion for argument 1 from ‘void’ to ‘int’ 111 | operator<<(int __n) | ~~~~^~~ /usr/include/c++/13/ostream:194:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 194 | operator<<(unsigned int __n) | ^~~~~~~~ /usr/include/c++/13/ostream:194:31: note: no known conversion for argument 1 from ‘void’ to ‘unsigned int’ 194 | operator<<(unsigned int __n) | ~~~~~~~~~~~~~^~~ /usr/include/c++/13/ostream:203:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 203 | operator<<(long long __n) | ^~~~~~~~ /usr/include/c++/13/ostream:203:28: note: no known conversion for argument 1 from ‘void’ to ‘long long int’ 203 | operator<<(long long __n) | ~~~~~~~~~~^~~ /usr/include/c++/13/ostream:207:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 207 | operator<<(unsigned long long __n) | ^~~~~~~~ /usr/include/c++/13/ostream:207:37: note: no known conversion for argument 1 from ‘void’ to ‘long long unsigned int’ 207 | operator<<(unsigned long long __n) | ~~~~~~~~~~~~~~~~~~~^~~ /usr/include/c++/13/ostream:222:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(double) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 222 | operator<<(double __f) | ^~~~~~~~ /usr/include/c++/13/ostream:222:25: note: no known conversion for argument 1 from ‘void’ to ‘double’ 222 | operator<<(double __f) | ~~~~~~~^~~ /usr/include/c++/13/ostream:226:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(float) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 226 | operator<<(float __f) | ^~~~~~~~ /usr/include/c++/13/ostream:226:24: note: no known conversion for argument 1 from ‘void’ to ‘float’ 226 | operator<<(float __f) | ~~~~~~^~~ /usr/include/c++/13/ostream:234:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long double) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 234 | operator<<(long double __f) | ^~~~~~~~ /usr/include/c++/13/ostream:234:30: note: no known conversion for argument 1 from ‘void’ to ‘long double’ 234 | operator<<(long double __f) | ~~~~~~~~~~~~^~~ /usr/include/c++/13/ostream:292:7: note: candidate: ‘std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(const void*) [with _CharT = char; _Traits = std::char_traits<char>; __ostream_type = std::basic_ostream<char>]’ 292 | operator<<(const void* __p) | ^~~~~~~~ /usr/include/c++/13/ostream:292:30: note: no known conversion for argument 1 from ‘void’ to ‘const void*’ 292 | operator<<(const void* __p) | ~~~~~~~~~~~~^~~ /usr/include/c++/13/bits/ostream.tcc:124:5: note: candidate: ‘std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(__streambuf_type*) [with _CharT = char; _Traits = std::char_traits<char>; __streambuf_type = std::basic_streambuf<char>]’ 124 | basic_ostream<_CharT, _Traits>:: | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/13/bits/ostream.tcc:125:34: note: no known conversion for argument 1 from ‘void’ to ‘std::basic_ostream<char>::__streambuf_type*’ {aka ‘std::basic_streambuf<char>*’} 125 | operator<<(__streambuf_type* __sbin) | ~~~~~~~~~~~~~~~~~~^~~~~~ 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: /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: stiva.cpp:35:31: note: mismatched types ‘const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’ and ‘void’ 35 | cout<<top()<<endl; | ^ 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: stiva.cpp:35:30: note: cannot convert ‘top()’ (type ‘void’) to type ‘const std::error_code&’ 35 | cout<<top()<<endl; | ~~~^~ /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: stiva.cpp:35:31: note: deduced conflicting types for parameter ‘_CharT’ (‘char’ and ‘void’) 35 | cout<<top()<<endl; | ^ /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: stiva.cpp:35:30: note: cannot convert ‘top()’ (type ‘void’) to type ‘char’ 35 | cout<<top()<<endl; | ~~~^~ /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: stiva.cpp:35:30: note: cannot convert ‘top()’ (type ‘void’) to type ‘char’ 35 | cout<<top()<<endl; | ~~~^~ /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: stiva.cpp:35:30: note: cannot convert ‘top()’ (type ‘void’) to type ‘signed char’ 35 | cout<<top()<<endl; | ~~~^~ /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: stiva.cpp:35:30: note: cannot convert ‘top()’ (type ‘void’) to type ‘unsigned char’ 35 | cout<<top()<<endl; | ~~~^~ /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: stiva.cpp:35:31: note: mismatched types ‘const _CharT*’ and ‘void’ 35 | cout<<top()<<endl; | ^ /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: stiva.cpp:35:30: note: cannot convert ‘top()’ (type ‘void’) to type ‘const char*’ 35 | cout<<top()<<endl; | ~~~^~ /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: stiva.cpp:35:30: note: cannot convert ‘top()’ (type ‘void’) to type ‘const char*’ 35 | cout<<top()<<endl; | ~~~^~ /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: stiva.cpp:35:30: note: cannot convert ‘top()’ (type ‘void’) to type ‘const signed char*’ 35 | cout<<top()<<endl; | ~~~^~ /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: stiva.cpp:35:30: note: cannot convert ‘top()’ (type ‘void’) to type ‘const unsigned char*’ 35 | cout<<top()<<endl; | ~~~^~ /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::basic_ostream<char>&; _Tp = void]’: stiva.cpp:35:31: required from here /usr/include/c++/13/ostream:801:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’ stiva.cpp:20:13: warning: unused variable ‘i’ [-Wunused-variable] 20 | int n,x,i; | ^
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 Stiva 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.