Rezumat problemă

Detalii

Problema	scadere2	Operații I/O	tastatură/ecran
Limita timp	0.1 secunde	Limita memorie	Total: 64 MB / Stivă 8 MB
Id soluție	#53455132	Utilizator	Constantin Tudor Eduard (TudorEduard)
Fișier	scadere2.cpp	Dimensiune	269 B
Data încărcării	31 Octombrie 2024, 16:13	Scor / rezultat	Eroare de compilare

Evaluare

Mesaj compilare

scadere2.cpp: In function 'int main()':
scadere2.cpp:15:5: error: redefinition of 'int main()'
 int main()

     ^
scadere2.cpp:3:5: error: 'int main()' previously defined here
 int main()

     ^
scadere2.cpp:19:9: error: ambiguous overload for 'operator>>' (operand types are 'std::istream {aka std::basic_istream<char>}' and 'int')
     cin >> a - b ;

         ^
scadere2.cpp:19:9: note: candidates are:
In file included from /usr/include/c++/4.8/iostream:40:0,
                 from scadere2.cpp:1:
/usr/include/c++/4.8/istream:120:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__istream_type& (*)(std::basic_istream<_CharT, _Traits>::__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] <near match>
       operator>>(__istream_type& (*__pf)(__istream_type&))
       ^
/usr/include/c++/4.8/istream:120:7: note:   no known conversion for argument 1 from 'int' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&) {aka std::basic_istream<char>& (*)(std::basic_istream<char>&)}'
/usr/include/c++/4.8/istream:124:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__ios_type& (*)(std::basic_istream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>; std::basic_istream<_CharT, _Traits>::__ios_type = std::basic_ios<char>] <near match>
       operator>>(__ios_type& (*__pf)(__ios_type&))
       ^
/usr/include/c++/4.8/istream:124:7: note:   no known conversion for argument 1 from 'int' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&) {aka std::basic_ios<char>& (*)(std::basic_ios<char>&)}'
/usr/include/c++/4.8/istream:131:7: note: std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>] <near match>
       operator>>(ios_base& (*__pf)(ios_base&))
       ^
/usr/include/c++/4.8/istream:131:7: note:   no known conversion for argument 1 from 'int' to 'std::ios_base& (*)(std::ios_base&)'
/usr/include/c++/4.8/istream:259:7: note: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(std::basic_istream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>] <near match>
       operator>>(__streambuf_type* __sb);
       ^
/usr/include/c++/4.8/istream:259:7: note:   no known conversion for argument 1 from 'int' to 'std::basic_istream<char>::__streambuf_type* {aka std::basic_streambuf<char>*}'
scadere2.cpp:19:14: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
     cin >> a - b ;

              ^

Cum funcționează evaluarea?