foo.cc: In function ‘int main()’:
foo.cc:7:22: warning: comparison of integer expressions of different signedness: ‘int’ and ‘std::__cxx11::basic_string<char>::size_type’ {aka ‘long unsigned int’} [-Wsign-compare]
7 | for(int i=0;i<s.size();i++)
| ~^~~~~~~~~
foo.cc:9:24: warning: comparison with string literal results in unspecified behavior [-Waddress]
9 | if(s[i]=="+")
foo.cc:9:24: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
foo.cc:10:27: error: no ‘operator++(int)’ declared for postfix ‘++’ [-fpermissive]
10 | c1++;
| ~~^~
foo.cc:12:27: error: no ‘operator++(int)’ declared for postfix ‘++’ [-fpermissive]
12 | c2++;
| ~~^~
foo.cc:14:17: error: no match for ‘operator-’ (operand types are ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} and ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’})
14 | cout<<c1-c2;
| ~~^~~
| | |
| | basic_string<[...]>
| basic_string<[...]>
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/bits/stl_algobase.h:67,
from /nix/gcc-13.3.0/include/c++/13.3.0/algorithm:60,
from stdc++.h:51:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/stl_iterator.h:625:5: note: candidate: ‘template<class _IteratorL, class _IteratorR> decltype ((__y.base() - __x.base())) std::operator-(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)’
625 | operator-(const reverse_iterator<_IteratorL>& __x,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/stl_iterator.h:625:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::reverse_iterator<_Iterator>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/stl_iterator.h:1800:5: note: candidate: ‘template<class _IteratorL, class _IteratorR> decltype ((__x.base() - __y.base())) std::operator-(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)’
1800 | operator-(const move_iterator<_IteratorL>& __x,
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/stl_iterator.h:1800:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::move_iterator<_IteratorL>’
14 | cout<<c1-c2;
| ^~
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/ccomplex:39,
from stdc++.h:127:
/nix/gcc-13.3.0/include/c++/13.3.0/complex:365:5: note: candidate: ‘template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const complex<_Tp>&)’
365 | operator-(const complex<_Tp>& __x, const complex<_Tp>& __y)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/complex:365:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::complex<_Tp>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/complex:374:5: note: candidate: ‘template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const _Tp&)’
374 | operator-(const complex<_Tp>& __x, const _Tp& __y)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/complex:374:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::complex<_Tp>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/complex:383:5: note: candidate: ‘template<class _Tp> std::complex<_Tp> std::operator-(const _Tp&, const complex<_Tp>&)’
383 | operator-(const _Tp& __x, const complex<_Tp>& __y)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/complex:383:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::complex<_Tp>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/complex:460:5: note: candidate: ‘template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&)’
460 | operator-(const complex<_Tp>& __x)
| ^~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/complex:460:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::complex<_Tp>’
14 | cout<<c1-c2;
| ^~
In file included from /nix/gcc-13.3.0/include/c++/13.3.0/valarray:605,
from stdc++.h:166:
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: candidate: ‘template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)’
406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)’
406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)’
406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)’
406 | _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/bits/valarray_after.h:406:5: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1197:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const valarray<_Tp>&, const valarray<_Tp>&)’
1197 | _DEFINE_BINARY_OPERATOR(-, __minus)
| ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1197:1: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::valarray<_Tp>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1197:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)’
1197 | _DEFINE_BINARY_OPERATOR(-, __minus)
| ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1197:1: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::valarray<_Tp>’
14 | cout<<c1-c2;
| ^~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1197:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__minus, _Tp>::result_type> std::operator-(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)’
1197 | _DEFINE_BINARY_OPERATOR(-, __minus)
| ^~~~~~~~~~~~~~~~~~~~~~~
/nix/gcc-13.3.0/include/c++/13.3.0/valarray:1197:1: note: template argument deduction/substitution failed:
foo.cc:14:18: note: ‘std::string’ {aka ‘std::__cxx11::basic_string<char>’} is not derived from ‘const std::valarray<_Tp>’
14 | cout<<c1-c2;
| ^~
240914gj汤政豪 (2023124汤政豪) LV 7
undefined
