foo.cc:15:48: error: extended character “ is not valid in an identifier
15 | cout << fixed << setprecision(4)<< d <<“ ”<< c <<“ ”<< s << endl;
| ^
foo.cc:15:50: error: extended character ” is not valid in an identifier
15 | cout << fixed << setprecision(4)<< d <<“ ”<< c <<“ ”<< s << endl;
| ^
foo.cc:15:58: error: extended character “ is not valid in an identifier
15 | cout << fixed << setprecision(4)<< d <<“ ”<< c <<“ ”<< s << endl;
| ^
foo.cc:15:60: error: extended character ” is not valid in an identifier
15 | cout << fixed << setprecision(4)<< d <<“ ”<< c <<“ ”<< s << endl;
| ^
foo.cc: In function 'int main()':
foo.cc:9:13: error: no match for 'operator<<' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'double')
9 | cin << r;
| ~~~ ^~ ~
| | |
| | double
| std::istream {aka std::basic_istream<char>}
In file included from /nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/string:55,
from /nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/bits/locale_classes.h:40,
from /nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/bits/ios_base.h:41,
from /nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ios:42,
from /nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:38,
from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/bits/basic_string.h:6531:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)'
6531 | operator<<(basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/bits/basic_string.h:6531:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from /nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/bits/ios_base.h:46,
from /nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ios:42,
from /nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:38,
from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/system_error:279:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)'
279 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/system_error:279:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:513:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT)'
513 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:513:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:518:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)'
518 | operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:518:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:524:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char)'
524 | operator<<(basic_ostream<char, _Traits>& __out, char __c)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:524:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:530:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char)'
530 | operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:530:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:535:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char)'
535 | operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:535:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:594:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*)'
594 | operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:594:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from /nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:829,
from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/bits/ostream.tcc:321:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const char*)'
321 | operator<<(basic_ostream<_CharT, _Traits>& __out, const char* __s)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/bits/ostream.tcc:321:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:611:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*)'
611 | operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:611:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:624:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*)'
624 | operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:624:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:629:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*)'
629 | operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:629:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<char, _Traits>'
9 | cin << r;
| ^
In file included from iostream:39:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:750:5: note: candidate: 'template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&)'
750 | operator<<(_Ostream&& __os, const _Tp& __x)
| ^~~~~~~~
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:750:5: note: template argument deduction/substitution failed:
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream: In substitution of 'template<class _Ostream, class _Tp> _Ostream&& std::operator<<(_Ostream&&, const _Tp&) [with _Ostream = std::basic_istream<char>&; _Tp = double]':
foo.cc:9:9: required from here
/nix/store/42izybv2fz3ps5pcg3dvcmn85pc9406y-gcc-11.3.0/include/c++/11.3.0/ostream:750:5: error: no type named 'type' in 'struct std::enable_if<false, void>'
In file included from foo.cc:2:
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:79:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Resetiosflags)'
79 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
| ^~~~~~~~
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:79:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from foo.cc:2:
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:109:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setiosflags)'
109 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
| ^~~~~~~~
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:109:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from foo.cc:2:
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:143:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setbase)'
143 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
| ^~~~~~~~
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:143:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from foo.cc:2:
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:178:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setfill<_CharT>)'
178 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
| ^~~~~~~~
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:178:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from foo.cc:2:
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:208:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setprecision)'
208 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
| ^~~~~~~~
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:208:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from foo.cc:2:
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:238:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Setw)'
238 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
| ^~~~~~~~
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:238:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from foo.cc:2:
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:311:5: note: candidate: 'template<class _CharT, class _Traits, class _MoneyT> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Put_money<_MoneyT>)'
311 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
| ^~~~~~~~
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:311:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
In file included from foo.cc:2:
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:363:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, std::_Put_time<_CharT>)'
363 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_time<_CharT> __f)
| ^~~~~~~~
/nix/store/lwv26rw55rr8k8dc9217ifp5sb0fr9k4-gcc/include/c++/11.3.0/iomanip:363:5: note: template argument deduction/substitution failed:
foo.cc:9:16: note: 'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'std::basic_ostream<_CharT, _Traits>'
9 | cin << r;
| ^
foo.cc:12:14: error: 'pi' was not declared in this scope; did you mean 'p'?
12 | c =2*pi*r;
| ^~
| p
foo.cc:15:48: error: '\U0000201c' was not declared in this scope
15 | cout << fixed << setprecision(4)<< d <<“ ”<< c <<“ ”<< s << endl;
| ^
foo.cc:7:22: warning: unused variable 'p' [-Wunused-variable]
7 | const double p=3.14159;
| ^
盛泽一中顾轩霆 LV 4
undefined
