foo.cc: In function 'int main()':
foo.cc:7:8: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'char')
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ~~~~~~^~~~~
| | |
| | char
| std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:120:7: note: candidate: '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>
120 | operator>>(__istream_type& (*__pf)(__istream_type&))
| ^~~~~~~~
/usr/include/c++/9/istream:120:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: invalid conversion from 'char' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
| |
| char
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:124:7: note: candidate: '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>
124 | operator>>(__ios_type& (*__pf)(__ios_type&))
| ^~~~~~~~
/usr/include/c++/9/istream:124:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: invalid conversion from 'char' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'} [-fpermissive]
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
| |
| char
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:131:7: note: candidate: '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>
131 | operator>>(ios_base& (*__pf)(ios_base&))
| ^~~~~~~~
/usr/include/c++/9/istream:131:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: invalid conversion from 'char' to 'std::ios_base& (*)(std::ios_base&)' [-fpermissive]
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
| |
| char
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:168:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
168 | operator>>(bool& __n)
| ^~~~~~~~
/usr/include/c++/9/istream:168:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'bool&' to an rvalue of type 'bool'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:172:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' <near match>
172 | operator>>(short& __n);
| ^~~~~~~~
/usr/include/c++/9/istream:172:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'short int&' to an rvalue of type 'short int'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:175:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
175 | operator>>(unsigned short& __n)
| ^~~~~~~~
/usr/include/c++/9/istream:175:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'short unsigned int&' to an rvalue of type 'short unsigned int'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:179:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' <near match>
179 | operator>>(int& __n);
| ^~~~~~~~
/usr/include/c++/9/istream:179:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'int&' to an rvalue of type 'int'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:182:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
182 | operator>>(unsigned int& __n)
| ^~~~~~~~
/usr/include/c++/9/istream:182:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'unsigned int&' to an rvalue of type 'unsigned int'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:186:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
186 | operator>>(long& __n)
| ^~~~~~~~
/usr/include/c++/9/istream:186:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'long int&' to an rvalue of type 'long int'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:190:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
190 | operator>>(unsigned long& __n)
| ^~~~~~~~
/usr/include/c++/9/istream:190:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'long unsigned int&' to an rvalue of type 'long unsigned int'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:195:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
195 | operator>>(long long& __n)
| ^~~~~~~~
/usr/include/c++/9/istream:195:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'long long int&' to an rvalue of type 'long long int'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
199 | operator>>(unsigned long long& __n)
| ^~~~~~~~
/usr/include/c++/9/istream:199:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'long long unsigned int&' to an rvalue of type 'long long unsigned int'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:214:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
214 | operator>>(float& __f)
| ^~~~~~~~
/usr/include/c++/9/istream:214:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'float&' to an rvalue of type 'float'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:218:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
218 | operator>>(double& __f)
| ^~~~~~~~
/usr/include/c++/9/istream:218:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'double&' to an rvalue of type 'double'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:222:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
222 | operator>>(long double& __f)
| ^~~~~~~~
/usr/include/c++/9/istream:222:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'long double&' to an rvalue of type 'long double'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:235:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_istream<_CharT, _Traits>::__istream_type = std::basic_istream<char>]' <near match>
235 | operator>>(void*& __p)
| ^~~~~~~~
/usr/include/c++/9/istream:235:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: invalid conversion from 'char' to 'void*' [-fpermissive]
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
| |
| char
foo.cc:7:10: error: cannot bind rvalue '(void*)32' to 'void*&'
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:259:7: note: candidate: '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>
259 | operator>>(__streambuf_type* __sb);
| ^~~~~~~~
/usr/include/c++/9/istream:259:7: note: conversion of argument 1 would be ill-formed:
foo.cc:7:10: error: invalid conversion from 'char' to 'std::basic_istream<char>::__streambuf_type*' {aka 'std::basic_streambuf<char>*'} [-fpermissive]
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
| |
| char
foo.cc:7:8: note: candidate: 'operator>>(int, int)' <built-in>
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ~~~~~~^~~~~
foo.cc:7:8: note: no known conversion for argument 1 from 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} to 'int'
In file included from /usr/include/c++/9/string:56,
from /usr/include/c++/9/bits/locale_classes.h:40,
from /usr/include/c++/9/bits/ios_base.h:41,
from /usr/include/c++/9/ios:42,
from /usr/include/c++/9/ostream:38,
from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/bits/basic_string.tcc:1466:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>&)'
1466 | operator>>(basic_istream<_CharT, _Traits>& __in,
| ^~~~~~~~
/usr/include/c++/9/bits/basic_string.tcc:1466:5: note: template argument deduction/substitution failed:
foo.cc:7:10: note: mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'char'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/istream:991,
from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/bits/istream.tcc:931:5: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&) [with _CharT = char; _Traits = std::char_traits<char>]' <near match>
931 | operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c)
| ^~~~~~~~
/usr/include/c++/9/bits/istream.tcc:931:5: note: conversion of argument 2 would be ill-formed:
foo.cc:7:10: error: cannot bind non-const lvalue reference of type 'char&' to an rvalue of type 'char'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:756:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char&)'
756 | operator>>(basic_istream<char, _Traits>& __in, unsigned char& __c)
| ^~~~~~~~
/usr/include/c++/9/istream:756:5: note: template argument deduction/substitution failed:
foo.cc:7:10: note: cannot convert '' '' (type 'char') to type 'unsigned char&'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:761:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char&)'
761 | operator>>(basic_istream<char, _Traits>& __in, signed char& __c)
| ^~~~~~~~
/usr/include/c++/9/istream:761:5: note: template argument deduction/substitution failed:
foo.cc:7:10: note: cannot convert '' '' (type 'char') to type 'signed char&'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/istream:991,
from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/bits/istream.tcc:963:5: note: candidate: 'template<class _CharT2, class _Traits2> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT2*)'
963 | operator>>(basic_istream<_CharT, _Traits>& __in, _CharT* __s)
| ^~~~~~~~
/usr/include/c++/9/bits/istream.tcc:963:5: note: template argument deduction/substitution failed:
foo.cc:7:10: note: mismatched types '_CharT2*' and 'char'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:803:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char*)'
803 | operator>>(basic_istream<char, _Traits>& __in, unsigned char* __s)
| ^~~~~~~~
/usr/include/c++/9/istream:803:5: note: template argument deduction/substitution failed:
foo.cc:7:10: note: cannot convert '' '' (type 'char') to type 'unsigned char*'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:808:5: note: candidate: 'template<class _Traits> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char*)'
808 | operator>>(basic_istream<char, _Traits>& __in, signed char* __s)
| ^~~~~~~~
/usr/include/c++/9/istream:808:5: note: template argument deduction/substitution failed:
foo.cc:7:10: note: cannot convert '' '' (type 'char') to type 'signed char*'
7 | cin>>a>>' '>>b>>' '>>c>>endl;
| ^~~
In file included from /usr/include/c++/9/iostream:40,
from foo.cc:1:
/usr/include/c++/9/istream:980:5: note: candidate: 'template<class _Istream, class _Tp> typename std::enable_if<std::__and_<std::__not_<std::is_lvalue_reference<_Tp> >, std::__is_convertible_to_basic_istream<_Istream>, std::__is_extractable<typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type, _Tp&&, void> >::value, typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type>::type std::operator>>(_Istream&&, _Tp&&)'
980 | operator>>(_Istream&& __is, _Tp&& __x)
| ^~~~~~~~
/usr/include/c++/9/istream:980:5: note: template argument deduction/substitution failed:
/usr/include/c++/9/istream: In substitution of 'template<class _Istream, class _Tp> typename std::enable_if<std::__and_<std::__not_<std::is_lvalue_reference<_Tp> >, std::__is_convertible_to_basic_istream<_Istream>, std::__is_extractable<typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type, _Tp&&, void> >::value, typename std::__is_convertible_to_basic_istream<_Tp>::__istream_type>::type std::operator>>(_Istream&&, _Tp&&) [with _Istream = std::basic_istream<char>&; _Tp = char]':
foo.cc:7:10: required from here
/usr/include/c++/9/istream:980:5: error: no type named 'type' in 'struct std::enable_if<false, std::basic_istream<char>&>'
foo.cc:8:14: warning: comparison of constant '10000' with boolean expression is always false [-Wbool-compare]
8 | if(-10000<a>10000&&-10000<b<10000&&-10000<c<10000)
| ~~~~~~~~^~~~~~
foo.cc:8:12: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
8 | if(-10000<a>10000&&-10000<b<10000&&-10000<c<10000)
| ~~~~~~^~
foo.cc:8:30: warning: comparison of constant '10000' with boolean expression is always true [-Wbool-compare]
8 | if(-10000<a>10000&&-10000<b<10000&&-10000<c<10000)
| ~~~~~~~~^~~~~~
foo.cc:8:28: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
8 | if(-10000<a>10000&&-10000<b<10000&&-10000<c<10000)
| ~~~~~~^~
foo.cc:8:46: warning: comparison of constant '10000' with boolean expression is always true [-Wbool-compare]
8 | if(-10000<a>10000&&-10000<b<10000&&-10000<c<10000)
| ~~~~~~~~^~~~~~
foo.cc:8:44: warning: comparisons like 'X<=Y<=Z' do not have their mathematical meaning [-Wparentheses]
8 | if(-10000<a>10000&&-10000<b<10000&&-10000<c<10000)
| ~~~~~~^~
12124徐幼曦 (12124徐幼曦) LV 3
undefined
