Rezumat problemă

Semn

#167

Să se scrie un program care citeşte de la tastatură un număr întreg şi determină semnul său.

Consola Candale Silviu (silviu) ușoară

Clasa 9 Elemente de baza ale limbajului Structura de decizie

Rezolvă

Detalii

Problema	Semn	Operații I/O	tastatură/ecran
Limita timp	1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64403214	Utilizator	Virjan Giulia Daiana (Giulia2014)
Fișier	semn.cpp	Dimensiune	120 B
Data încărcării	05 Mai 2026, 12:25	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

semn.cpp: In function ‘int n()’:
semn.cpp:8:13: warning: the address of ‘int n()’ will never be NULL [-Waddress]
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |             ^
semn.cpp:6:5: note: ‘int n()’ declared here
    6 | int n ()
      |     ^
semn.cpp:8:14: error: no match for ‘operator>’ (operand types are ‘std::basic_ostream<char>::__ostream_type’ {aka ‘std::basic_ostream<char>’} and ‘int’)
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |     ~~~~~~~~~^~
      |          |    |
      |          |    int
      |          std::basic_ostream<char>::__ostream_type {aka std::basic_ostream<char>}
semn.cpp:8:14: note: candidate: ‘operator>(int, int)’ (built-in)
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |     ~~~~~~~~~^~
semn.cpp:8:14: note:   no known conversion for argument 1 from ‘std::basic_ostream<char>::__ostream_type’ {aka ‘std::basic_ostream<char>’} to ‘int’
In file included from /usr/include/c++/13/string:48,
                 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 semn.cpp:2:
/usr/include/c++/13/bits/stl_iterator.h:469:5: note: candidate: ‘template<class _Iterator> bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)’
  469 |     operator>(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/13/bits/stl_iterator.h:469:5: note:   template argument deduction/substitution failed:
semn.cpp:8:15: note:   ‘std::basic_ostream<char>::__ostream_type’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::reverse_iterator<_Iterator>’
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |               ^
/usr/include/c++/13/bits/stl_iterator.h:514:5: note: candidate: ‘template<class _IteratorL, class _IteratorR> bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)’
  514 |     operator>(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/13/bits/stl_iterator.h:514:5: note:   template argument deduction/substitution failed:
semn.cpp:8:15: note:   ‘std::basic_ostream<char>::__ostream_type’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::reverse_iterator<_Iterator>’
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |               ^
/usr/include/c++/13/bits/stl_iterator.h:1725:5: note: candidate: ‘template<class _IteratorL, class _IteratorR> bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)’
 1725 |     operator>(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/13/bits/stl_iterator.h:1725:5: note:   template argument deduction/substitution failed:
semn.cpp:8:15: note:   ‘std::basic_ostream<char>::__ostream_type’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::move_iterator<_IteratorL>’
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |               ^
/usr/include/c++/13/bits/stl_iterator.h:1784:5: note: candidate: ‘template<class _Iterator> bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)’
 1784 |     operator>(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/13/bits/stl_iterator.h:1784:5: note:   template argument deduction/substitution failed:
semn.cpp:8:15: note:   ‘std::basic_ostream<char>::__ostream_type’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::move_iterator<_IteratorL>’
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |               ^
In file included from /usr/include/c++/13/bits/stl_algobase.h:64,
                 from /usr/include/c++/13/string:51:
/usr/include/c++/13/bits/stl_pair.h:848:5: note: candidate: ‘template<class _T1, class _T2> constexpr bool std::operator>(const pair<_T1, _T2>&, const pair<_T1, _T2>&)’
  848 |     operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/13/bits/stl_pair.h:848:5: note:   template argument deduction/substitution failed:
semn.cpp:8:15: note:   ‘std::basic_ostream<char>::__ostream_type’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::pair<_T1, _T2>’
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |               ^
In file included from /usr/include/c++/13/string:54:
/usr/include/c++/13/bits/basic_string.h:3870:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const __cxx11::basic_string<_CharT, _Traits, _Alloc>&, const __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
 3870 |     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3870:5: note:   template argument deduction/substitution failed:
semn.cpp:8:15: note:   ‘std::basic_ostream<char>::__ostream_type’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |               ^
/usr/include/c++/13/bits/basic_string.h:3884:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const __cxx11::basic_string<_CharT, _Traits, _Alloc>&, const _CharT*)’
 3884 |     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3884:5: note:   template argument deduction/substitution failed:
semn.cpp:8:15: note:   ‘std::basic_ostream<char>::__ostream_type’ {aka ‘std::basic_ostream<char>’} is not derived from ‘const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>’
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |               ^
/usr/include/c++/13/bits/basic_string.h:3897:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
 3897 |     operator>(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.h:3897:5: note:   template argument deduction/substitution failed:
semn.cpp:8:15: note:   mismatched types ‘const _CharT*’ and ‘std::basic_ostream<char>’
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |               ^
semn.cpp:8:20: error: ordered comparison of pointer with integer zero (‘int (*)()’ and ‘int’)
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |                   ~^~
semn.cpp:8:29: error: invalid operands of types ‘int’ and ‘<unresolved overloaded function type>’ to binary ‘operator>>’
    8 |     cout << n>0 , n<0 , n=0 >> endl;
      |                           ~~^~~~~~~

Cum funcționează evaluarea?