foo.cc:2:19: warning: extra tokens at end of #include directive
2 | #include <cstring>#include <cstdio>
| ^
foo.cc:5:26: error: expected ',' or '...' before 'start'
5 | int b(int a[],int keyint start,int end)
| ^~~~~
foo.cc: In function 'int b(int*, int)':
foo.cc:7:5: error: 'start' was not declared in this scope
7 | if(start<=end)
| ^~~~~
foo.cc:9:3: error: 'iny' was not declared in this scope; did you mean 'int'?
9 | iny mid=(start+end)/2;
| ^~~
| int
foo.cc:10:8: error: 'mid' was not declared in this scope
10 | if(a[mid]<key)
| ^~~
foo.cc:10:13: error: 'key' was not declared in this scope; did you mean 'key_t'?
10 | if(a[mid]<key)
| ^~~
| key_t
foo.cc:11:19: error: 'mib' was not declared in this scope
11 | return b(a,key,mib+1,end);
| ^~~
foo.cc: In function 'int main()':
foo.cc:21:2: error: 'inta' was not declared in this scope; did you mean 'int'?
21 | inta[n],n,i,key,start,end,mid,num=0,index;
| ^~~~
| int
foo.cc:21:7: error: 'n' was not declared in this scope
21 | inta[n],n,i,key,start,end,mid,num=0,index;
| ^
foo.cc:21:12: error: 'i' was not declared in this scope
21 | inta[n],n,i,key,start,end,mid,num=0,index;
| ^
foo.cc:21:14: error: 'key' was not declared in this scope; did you mean 'key_t'?
21 | inta[n],n,i,key,start,end,mid,num=0,index;
| ^~~
| key_t
foo.cc:21:18: error: 'start' was not declared in this scope
21 | inta[n],n,i,key,start,end,mid,num=0,index;
| ^~~~~
foo.cc:21:28: error: 'mid' was not declared in this scope
21 | inta[n],n,i,key,start,end,mid,num=0,index;
| ^~~
foo.cc:21:32: error: 'num' was not declared in this scope; did you mean 'enum'?
21 | inta[n],n,i,key,start,end,mid,num=0,index;
| ^~~
| enum
foo.cc:25:8: error: 'a' was not declared in this scope
25 | cin>>a[i];
| ^
foo.cc:31:10: error: 'a' was not declared in this scope
31 | index=b(a,key,start,end);
| ^
foo.cc:32:10: error: invalid operands of types '<unresolved overloaded function type>' and 'int' to binary 'operator=='
32 | if(index==-1)
| ~~~~~^~~~
foo.cc:35:7: error: no match for 'operator<<' (operand types are 'std::ostream' {aka 'std::basic_ostream<char>'} and '<unresolved overloaded function type>')
35 | cout<<index;
| ~~~~^~~~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:108:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ostream_type& (*)(std::basic_ostream<_CharT, _Traits>::__ostream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
108 | operator<<(__ostream_type& (*__pf)(__ostream_type&))
| ^~~~~~~~
/usr/include/c++/9/ostream:108:36: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::basic_ostream<char>::__ostream_type& (*)(std::basic_ostream<char>::__ostream_type&)' {aka 'std::basic_ostream<char>& (*)(std::basic_ostream<char>&)'}
108 | operator<<(__ostream_type& (*__pf)(__ostream_type&))
| ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/ostream:117:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__ios_type& (*)(std::basic_ostream<_CharT, _Traits>::__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>; std::basic_ostream<_CharT, _Traits>::__ios_type = std::basic_ios<char>]'
117 | operator<<(__ios_type& (*__pf)(__ios_type&))
| ^~~~~~~~
/usr/include/c++/9/ostream:117:32: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::basic_ostream<char>::__ios_type& (*)(std::basic_ostream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'}
117 | operator<<(__ios_type& (*__pf)(__ios_type&))
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
/usr/include/c++/9/ostream:127:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
127 | operator<<(ios_base& (*__pf) (ios_base&))
| ^~~~~~~~
/usr/include/c++/9/ostream:127:30: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::ios_base& (*)(std::ios_base&)'
127 | operator<<(ios_base& (*__pf) (ios_base&))
| ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/9/ostream:166:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
166 | operator<<(long __n)
| ^~~~~~~~
/usr/include/c++/9/ostream:166:23: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'long int'
166 | operator<<(long __n)
| ~~~~~^~~
/usr/include/c++/9/ostream:170:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
170 | operator<<(unsigned long __n)
| ^~~~~~~~
/usr/include/c++/9/ostream:170:32: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'long unsigned int'
170 | operator<<(unsigned long __n)
| ~~~~~~~~~~~~~~^~~
/usr/include/c++/9/ostream:174:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(bool) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
174 | operator<<(bool __n)
| ^~~~~~~~
/usr/include/c++/9/ostream:174:23: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'bool'
174 | operator<<(bool __n)
| ~~~~~^~~
In file included from /usr/include/c++/9/ostream:702,
from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/bits/ostream.tcc:91:5: note: candidate: 'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(short int) [with _CharT = char; _Traits = std::char_traits<char>]'
91 | basic_ostream<_CharT, _Traits>::
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/ostream.tcc:92:22: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'short int'
92 | operator<<(short __n)
| ~~~~~~^~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:181:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(short unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
181 | operator<<(unsigned short __n)
| ^~~~~~~~
/usr/include/c++/9/ostream:181:33: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'short unsigned int'
181 | operator<<(unsigned short __n)
| ~~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/9/ostream:702,
from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/bits/ostream.tcc:105:5: note: candidate: 'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(int) [with _CharT = char; _Traits = std::char_traits<char>]'
105 | basic_ostream<_CharT, _Traits>::
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/ostream.tcc:106:20: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'int'
106 | operator<<(int __n)
| ~~~~^~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:192:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
192 | operator<<(unsigned int __n)
| ^~~~~~~~
/usr/include/c++/9/ostream:192:31: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'unsigned int'
192 | operator<<(unsigned int __n)
| ~~~~~~~~~~~~~^~~
/usr/include/c++/9/ostream:201:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
201 | operator<<(long long __n)
| ^~~~~~~~
/usr/include/c++/9/ostream:201:28: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'long long int'
201 | operator<<(long long __n)
| ~~~~~~~~~~^~~
/usr/include/c++/9/ostream:205:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long long unsigned int) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
205 | operator<<(unsigned long long __n)
| ^~~~~~~~
/usr/include/c++/9/ostream:205:37: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'long long unsigned int'
205 | operator<<(unsigned long long __n)
| ~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/9/ostream:220:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(double) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
220 | operator<<(double __f)
| ^~~~~~~~
/usr/include/c++/9/ostream:220:25: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'double'
220 | operator<<(double __f)
| ~~~~~~~^~~
/usr/include/c++/9/ostream:224:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(float) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
224 | operator<<(float __f)
| ^~~~~~~~
/usr/include/c++/9/ostream:224:24: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'float'
224 | operator<<(float __f)
| ~~~~~~^~~
/usr/include/c++/9/ostream:232:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(long double) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
232 | operator<<(long double __f)
| ^~~~~~~~
/usr/include/c++/9/ostream:232:30: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'long double'
232 | operator<<(long double __f)
| ~~~~~~~~~~~~^~~
/usr/include/c++/9/ostream:245:7: note: candidate: 'std::basic_ostream<_CharT, _Traits>::__ostream_type& std::basic_ostream<_CharT, _Traits>::operator<<(const void*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__ostream_type = std::basic_ostream<char>]'
245 | operator<<(const void* __p)
| ^~~~~~~~
/usr/include/c++/9/ostream:245:30: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'const void*'
245 | operator<<(const void* __p)
| ~~~~~~~~~~~~^~~
In file included from /usr/include/c++/9/ostream:702,
from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/bits/ostream.tcc:119:5: note: candidate: 'std::basic_ostream<_CharT, _Traits>& std::basic_ostream<_CharT, _Traits>::operator<<(std::basic_ostream<_CharT, _Traits>::__streambuf_type*) [with _CharT = char; _Traits = std::char_traits<char>; std::basic_ostream<_CharT, _Traits>::__streambuf_type = std::basic_streambuf<char>]'
119 | basic_ostream<_CharT, _Traits>::
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/9/bits/ostream.tcc:120:34: note: no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::basic_ostream<char>::__streambuf_type*' {aka 'std::basic_streambuf<char>*'}
120 | operator<<(__streambuf_type* __sbin)
| ~~~~~~~~~~~~~~~~~~^~~~~~
In file included from /usr/include/c++/9/string:55,
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.h:6416:5: 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>&)'
6416 | operator<<(basic_ostream<_CharT, _Traits>& __os,
| ^~~~~~~~
/usr/include/c++/9/bits/basic_string.h:6416:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'const char*(const char*, int) throw ()' {aka 'const char*(const char*, int)'}
35 | cout<<index;
| ^~~~~
foo.cc:35:9: note: mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Alloc>' and 'char*(char*, int) throw ()' {aka 'char*(char*, int)'}
foo.cc:35:9: note: couldn't deduce template parameter '_Alloc'
In file included from /usr/include/c++/9/bits/ios_base.h:46,
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/system_error:217:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const std::error_code&)'
217 | operator<<(basic_ostream<_CharT, _Traits>& __os, const error_code& __e)
| ^~~~~~~~
/usr/include/c++/9/system_error:217:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: cannot convert 'index' (type '<unresolved overloaded function type>') to type 'const std::error_code&'
35 | cout<<index;
| ^~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:506:5: note: candidate: 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, _CharT) [with _CharT = char; _Traits = std::char_traits<char>]'
506 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
| ^~~~~~~~
/usr/include/c++/9/ostream:506:62: note: no known conversion for argument 2 from '<unresolved overloaded function type>' to 'char'
506 | operator<<(basic_ostream<_CharT, _Traits>& __out, _CharT __c)
| ~~~~~~~^~~
/usr/include/c++/9/ostream:511:5: note: candidate: 'template<class _CharT, class _Traits> std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, char)'
511 | operator<<(basic_ostream<_CharT, _Traits>& __out, char __c)
| ^~~~~~~~
/usr/include/c++/9/ostream:511:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: cannot convert 'index' (type '<unresolved overloaded function type>') to type 'char'
35 | cout<<index;
| ^~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:517:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, char)'
517 | operator<<(basic_ostream<char, _Traits>& __out, char __c)
| ^~~~~~~~
/usr/include/c++/9/ostream:517:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: cannot convert 'index' (type '<unresolved overloaded function type>') to type 'char'
35 | cout<<index;
| ^~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:523:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, signed char)'
523 | operator<<(basic_ostream<char, _Traits>& __out, signed char __c)
| ^~~~~~~~
/usr/include/c++/9/ostream:523:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: cannot convert 'index' (type '<unresolved overloaded function type>') to type 'signed char'
35 | cout<<index;
| ^~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:528:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, unsigned char)'
528 | operator<<(basic_ostream<char, _Traits>& __out, unsigned char __c)
| ^~~~~~~~
/usr/include/c++/9/ostream:528:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: cannot convert 'index' (type '<unresolved overloaded function type>') to type 'unsigned char'
35 | cout<<index;
| ^~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:548:5: note: candidate: 'std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&, const _CharT*) [with _CharT = char; _Traits = std::char_traits<char>]'
548 | operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
| ^~~~~~~~
/usr/include/c++/9/ostream:548:69: note: no known conversion for argument 2 from '<unresolved overloaded function type>' to 'const char*'
548 | operator<<(basic_ostream<_CharT, _Traits>& __out, const _CharT* __s)
| ~~~~~~~~~~~~~~^~~
In file included from /usr/include/c++/9/ostream:702,
from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/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)
| ^~~~~~~~
/usr/include/c++/9/bits/ostream.tcc:321:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: cannot convert 'index' (type '<unresolved overloaded function type>') to type 'const char*'
35 | cout<<index;
| ^~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:565:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const char*)'
565 | operator<<(basic_ostream<char, _Traits>& __out, const char* __s)
| ^~~~~~~~
/usr/include/c++/9/ostream:565:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: cannot convert 'index' (type '<unresolved overloaded function type>') to type 'const char*'
35 | cout<<index;
| ^~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:578:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const signed char*)'
578 | operator<<(basic_ostream<char, _Traits>& __out, const signed char* __s)
| ^~~~~~~~
/usr/include/c++/9/ostream:578:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: cannot convert 'index' (type '<unresolved overloaded function type>') to type 'const signed char*'
35 | cout<<index;
| ^~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:583:5: note: candidate: 'template<class _Traits> std::basic_ostream<char, _Traits>& std::operator<<(std::basic_ostream<char, _Traits>&, const unsigned char*)'
583 | operator<<(basic_ostream<char, _Traits>& __out, const unsigned char* __s)
| ^~~~~~~~
/usr/include/c++/9/ostream:583:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: cannot convert 'index' (type '<unresolved overloaded function type>') to type 'const unsigned char*'
35 | cout<<index;
| ^~~~~
In file included from /usr/include/c++/9/iostream:39,
from foo.cc:1:
/usr/include/c++/9/ostream:691:5: note: candidate: 'template<class _Ostream, class _Tp> typename std::enable_if<std::__and_<std::__not_<std::is_lvalue_reference<_Tp> >, std::__is_convertible_to_basic_ostream<_Ostream>, std::__is_insertable<typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type, const _Tp&, void> >::value, typename std::__is_convertible_to_basic_ostream<_Tp>::__ostream_type>::type std::operator<<(_Ostream&&, const _Tp&)'
691 | operator<<(_Ostream&& __os, const _Tp& __x)
| ^~~~~~~~
/usr/include/c++/9/ostream:691:5: note: template argument deduction/substitution failed:
foo.cc:35:9: note: couldn't deduce template parameter '_Tp'
35 | cout<<index;
| ^~~~~
foo.cc:20:12: warning: unused variable 'N' [-Wunused-variable]
20 | const int N=100;
| ^
倪君篪 LV 6
undefined
