Rezumat problemă

sum00

#939

Să se scrie un program care citeşte de la tastatura două numere naturale şi determină suma lor.

Consola Candale Silviu (silviu) ușoară

Clasa 9 Elemente de baza ale limbajului Operatori și expresii

Rezolvă

Detalii

Problema	sum00	Operații I/O	tastatură/ecran
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#64523030	Utilizator	Atomei Ianis (ianisqqe)
Fișier	sum00.cpp	Dimensiune	190 B
Data încărcării	12 Mai 2026, 12:50	Scor/rezultat	Eroare de compilare

Evaluare

Mesaj compilare

sum00.cpp: In function ‘int main()’:
sum00.cpp:10:15: error: no match for ‘operator>>’ (operand types are ‘std::basic_ostream<char>’ and ‘int’)
   10 | cout<<"a + b=">>a + b;
      | ~~~~~~~~~~~~~~^~~~~~~
      |     |             |
      |     |             int
      |     std::basic_ostream<char>
sum00.cpp:10:15: note: candidate: ‘operator>>(int, int)’ (built-in)
   10 | cout<<"a + b=">>a + b;
      | ~~~~~~~~~~~~~~^~~~~~~
sum00.cpp:10:15: note:   no known conversion for argument 1 from ‘std::basic_ostream<char>’ to ‘int’
In file included from /usr/include/c++/13/string:55,
                 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 sum00.cpp:1:
/usr/include/c++/13/bits/basic_string.tcc:827:5: note: candidate: ‘template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, __cxx11::basic_string<_CharT, _Traits, _Alloc>&)’
  827 |     operator>>(basic_istream<_CharT, _Traits>& __in,
      |     ^~~~~~~~
/usr/include/c++/13/bits/basic_string.tcc:827:5: note:   template argument deduction/substitution failed:
sum00.cpp:10:21: note:   ‘std::basic_ostream<char>’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
   10 | cout<<"a + b=">>a + b;
      |                     ^
In file included from /usr/include/c++/13/istream:1106,
                 from /usr/include/c++/13/iostream:42:
/usr/include/c++/13/bits/istream.tcc:975:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT&)’
  975 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
      |     ^~~~~~~~
/usr/include/c++/13/bits/istream.tcc:975:5: note:   template argument deduction/substitution failed:
sum00.cpp:10:21: note:   ‘std::basic_ostream<char>’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
   10 | cout<<"a + b=">>a + b;
      |                     ^
/usr/include/c++/13/istream:846:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char&)’
  846 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
      |     ^~~~~~~~
/usr/include/c++/13/istream:846:5: note:   template argument deduction/substitution failed:
sum00.cpp:10:21: note:   ‘std::basic_ostream<char>’ is not derived from ‘std::basic_istream<char, _Traits>’
   10 | cout<<"a + b=">>a + b;
      |                     ^
/usr/include/c++/13/istream:851:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char&)’
  851 |     operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
      |     ^~~~~~~~
/usr/include/c++/13/istream:851:5: note:   template argument deduction/substitution failed:
sum00.cpp:10:21: note:   ‘std::basic_ostream<char>’ is not derived from ‘std::basic_istream<char, _Traits>’
   10 | cout<<"a + b=">>a + b;
      |                     ^
/usr/include/c++/13/istream:893:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(basic_istream<_CharT, _Traits>&, _CharT*)’
  893 |     operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
      |     ^~~~~~~~
/usr/include/c++/13/istream:893:5: note:   template argument deduction/substitution failed:
sum00.cpp:10:21: note:   ‘std::basic_ostream<char>’ is not derived from ‘std::basic_istream<_CharT, _Traits>’
   10 | cout<<"a + b=">>a + b;
      |                     ^
/usr/include/c++/13/istream:936:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, unsigned char*)’
  936 |     operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/istream:936:5: note:   template argument deduction/substitution failed:
sum00.cpp:10:21: note:   ‘std::basic_ostream<char>’ is not derived from ‘std::basic_istream<char, _Traits>’
   10 | cout<<"a + b=">>a + b;
      |                     ^
/usr/include/c++/13/istream:942:5: note: candidate: ‘template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(basic_istream<char, _Traits>&, signed char*)’
  942 |     operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
      |     ^~~~~~~~
/usr/include/c++/13/istream:942:5: note:   template argument deduction/substitution failed:
sum00.cpp:10:21: note:   ‘std::basic_ostream<char>’ is not derived from ‘std::basic_istream<char, _Traits>’
   10 | cout<<"a + b=">>a + b;
      |                     ^
/usr/include/c++/13/istream:1096:5: note: candidate: ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&)’
 1096 |     operator>>(_Istream&& __is, _Tp&& __x)
      |     ^~~~~~~~
/usr/include/c++/13/istream:1096:5: note:   template argument deduction/substitution failed:
/usr/include/c++/13/istream: In substitution of ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_ostream<char>&; _Tp = int]’:
sum00.cpp:10:21:   required from here
/usr/include/c++/13/istream:1096:5: error: no type named ‘type’ in ‘struct std::enable_if<false, void>’
sum00.cpp:10:19: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses]
   10 | cout<<"a + b=">>a + b;
      |                 ~~^~~

Cum funcționează evaluarea?