setbase.cpp

本文通过一个简单的C++程序示例,展示了如何使用iostream库中的setbase函数将同一个数值转换为八进制、十进制及十六进制并输出。此示例有助于初学者理解C++中数字进制转换的基本方法。

  name="google_ads_frame" marginwidth="0" marginheight="0" src="http://pagead2.googlesyndication.com/pagead/ads?client=ca-pub-5572165936844014&dt=1194442938015&lmt=1194190197&format=336x280_as&output=html&correlator=1194442937843&url=file%3A%2F%2F%2FC%3A%2FDocuments%2520and%2520Settings%2Flhh1%2F%E6%A1%8C%E9%9D%A2%2FCLanguage.htm&color_bg=FFFFFF&color_text=000000&color_link=000000&color_url=FFFFFF&color_border=FFFFFF&ad_type=text&ga_vid=583001034.1194442938&ga_sid=1194442938&ga_hid=1942779085&flash=9&u_h=768&u_w=1024&u_ah=740&u_aw=1024&u_cd=32&u_tz=480&u_java=true" frameborder="0" width="336" scrolling="no" height="280" allowtransparency="allowtransparency"> #include <iostream.h>
#include <iomanip.h>

void main(void)
 {
   cout << setbase(8) << 255 << '/n';
   cout << setbase(10) << 255 << '/n';
   cout << setbase(16) << 255 << '/n';
 }

a.cpp: In function ‘int main()’: a.cpp:7:16: error: no match for ‘operator>>’ (operand types are ‘std::basic_istream<char>::__istream_type’ {aka ‘std::basic_istream<char>’} and ‘<unresolved overloaded function type>’) 7 | cin>>number>>endl; | ~~~~~~~~~~~^~~~~~ In file included from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/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>]’ 120 | operator>>(__istream_type& (*__pf)(__istream_type&)) | ^~~~~~~~ /usr/include/c++/11/istream:120:36: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)’ {aka ‘std::basic_istream<char>& (*)(std::basic_istream<char>&)’} 120 | operator>>(__istream_type& (*__pf)(__istream_type&)) | ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/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>]’ 124 | operator>>(__ios_type& (*__pf)(__ios_type&)) | ^~~~~~~~ /usr/include/c++/11/istream:124:32: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&)’ {aka ‘std::basic_ios<char>& (*)(std::basic_ios<char>&)’} 124 | operator>>(__ios_type& (*__pf)(__ios_type&)) | ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~ /usr/include/c++/11/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>]’ 131 | operator>>(ios_base& (*__pf)(ios_base&)) | ^~~~~~~~ /usr/include/c++/11/istream:131:30: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘std::ios_base& (*)(std::ios_base&)’ 131 | operator>>(ios_base& (*__pf)(ios_base&)) | ~~~~~~~~~~~~^~~~~~~~~~~~~~~~ /usr/include/c++/11/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>]’ 168 | operator>>(bool& __n) | ^~~~~~~~ /usr/include/c++/11/istream:168:24: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘bool&’ 168 | operator>>(bool& __n) | ~~~~~~^~~ /usr/include/c++/11/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>]’ 172 | operator>>(short& __n); | ^~~~~~~~ /usr/include/c++/11/istream:172:25: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘short int&’ 172 | operator>>(short& __n); | ~~~~~~~^~~ /usr/include/c++/11/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>]’ 175 | operator>>(unsigned short& __n) | ^~~~~~~~ /usr/include/c++/11/istream:175:34: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘short unsigned int&’ 175 | operator>>(unsigned short& __n) | ~~~~~~~~~~~~~~~~^~~ /usr/include/c++/11/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>]’ 179 | operator>>(int& __n); | ^~~~~~~~ /usr/include/c++/11/istream:179:23: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘int&’ 179 | operator>>(int& __n); | ~~~~~^~~ /usr/include/c++/11/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>]’ 182 | operator>>(unsigned int& __n) | ^~~~~~~~ /usr/include/c++/11/istream:182:32: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘unsigned int&’ 182 | operator>>(unsigned int& __n) | ~~~~~~~~~~~~~~^~~ /usr/include/c++/11/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>]’ 186 | operator>>(long& __n) | ^~~~~~~~ /usr/include/c++/11/istream:186:24: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘long int&’ 186 | operator>>(long& __n) | ~~~~~~^~~ /usr/include/c++/11/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>]’ 190 | operator>>(unsigned long& __n) | ^~~~~~~~ /usr/include/c++/11/istream:190:33: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘long unsigned int&’ 190 | operator>>(unsigned long& __n) | ~~~~~~~~~~~~~~~^~~ /usr/include/c++/11/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>]’ 195 | operator>>(long long& __n) | ^~~~~~~~ /usr/include/c++/11/istream:195:29: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘long long int&’ 195 | operator>>(long long& __n) | ~~~~~~~~~~~^~~ /usr/include/c++/11/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>]’ 199 | operator>>(unsigned long long& __n) | ^~~~~~~~ /usr/include/c++/11/istream:199:38: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘long long unsigned int&’ 199 | operator>>(unsigned long long& __n) | ~~~~~~~~~~~~~~~~~~~~^~~ /usr/include/c++/11/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>]’ 214 | operator>>(float& __f) | ^~~~~~~~ /usr/include/c++/11/istream:214:25: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘float&’ 214 | operator>>(float& __f) | ~~~~~~~^~~ /usr/include/c++/11/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>]’ 218 | operator>>(double& __f) | ^~~~~~~~ /usr/include/c++/11/istream:218:26: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘double&’ 218 | operator>>(double& __f) | ~~~~~~~~^~~ /usr/include/c++/11/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>]’ 222 | operator>>(long double& __f) | ^~~~~~~~ /usr/include/c++/11/istream:222:31: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘long double&’ 222 | operator>>(long double& __f) | ~~~~~~~~~~~~~^~~ /usr/include/c++/11/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>]’ 235 | operator>>(void*& __p) | ^~~~~~~~ /usr/include/c++/11/istream:235:25: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘void*&’ 235 | operator>>(void*& __p) | ~~~~~~~^~~ /usr/include/c++/11/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>]’ 259 | operator>>(__streambuf_type* __sb); | ^~~~~~~~ /usr/include/c++/11/istream:259:36: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘std::basic_istream<char>::__streambuf_type*’ {aka ‘std::basic_streambuf<char>*’} 259 | operator>>(__streambuf_type* __sb); | ~~~~~~~~~~~~~~~~~~^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:45, from a.cpp:1: /usr/include/c++/11/cstddef:132:5: note: candidate: ‘template<class _IntegerType> constexpr std::__byte_op_t<_IntegerType> std::operator>>(std::byte, _IntegerType)’ 132 | operator>>(byte __b, _IntegerType __shift) noexcept | ^~~~~~~~ /usr/include/c++/11/cstddef:132:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_IntegerType’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/string:56, from /usr/include/c++/11/bits/locale_classes.h:40, from /usr/include/c++/11/bits/ios_base.h:41, from /usr/include/c++/11/ios:42, from /usr/include/c++/11/istream:38, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/bits/basic_string.tcc:1485:5: 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, _Allocator>&)’ 1485 | operator>>(basic_istream<_CharT, _Traits>& __in, | ^~~~~~~~ /usr/include/c++/11/bits/basic_string.tcc:1485:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Alloc’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/istream:1016, from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/bits/istream.tcc:958:5: note: candidate: ‘std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT&) [with _CharT = char; _Traits = std::char_traits<char>]’ 958 | operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c) | ^~~~~~~~ /usr/include/c++/11/bits/istream.tcc:958:62: note: no known conversion for argument 2 from ‘<unresolved overloaded function type>’ to ‘char&’ 958 | operator>>(basic_istream<_CharT, _Traits>& __in, _CharT& __c) | ~~~~~~~~^~~ In file included from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/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++/11/istream:756:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: cannot convert ‘std::endl’ (type ‘<unresolved overloaded function type>’) to type ‘unsigned char&’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/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++/11/istream:761:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: cannot convert ‘std::endl’ (type ‘<unresolved overloaded function type>’) to type ‘signed char&’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/istream:859:5: note: candidate: ‘template<class _CharT, class _Traits, long unsigned int _Num> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, _CharT (&)[_Num])’ 859 | operator>>(basic_istream<_CharT, _Traits>& __in, _CharT (&__s)[_Num]) | ^~~~~~~~ /usr/include/c++/11/istream:859:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Num’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/istream:868:5: note: candidate: ‘template<class _Traits, long unsigned int _Num> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, unsigned char (&)[_Num])’ 868 | operator>>(basic_istream<char, _Traits>& __in, unsigned char (&__s)[_Num]) | ^~~~~~~~ /usr/include/c++/11/istream:868:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Num’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/istream:873:5: note: candidate: ‘template<class _Traits, long unsigned int _Num> std::basic_istream<char, _Traits>& std::operator>>(std::basic_istream<char, _Traits>&, signed char (&)[_Num])’ 873 | operator>>(basic_istream<char, _Traits>& __in, signed char (&__s)[_Num]) | ^~~~~~~~ /usr/include/c++/11/istream:873:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Num’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/sstream:38, from /usr/include/c++/11/complex:45, from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/istream:1006:5: note: candidate: ‘template<class _Istream, class _Tp> _Istream&& std::operator>>(_Istream&&, _Tp&&)’ 1006 | operator>>(_Istream&& __is, _Tp&& __x) | ^~~~~~~~ /usr/include/c++/11/istream:1006:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Tp’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:54, from a.cpp:1: /usr/include/c++/11/complex:501:5: note: candidate: ‘template<class _Tp, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::complex<_Tp>&)’ 501 | operator>>(basic_istream<_CharT, _Traits>& __is, complex<_Tp>& __x) | ^~~~~~~~ /usr/include/c++/11/complex:501:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Tp’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:66, from a.cpp:1: /usr/include/c++/11/bitset:1472:5: note: candidate: ‘template<class _CharT, class _Traits, long unsigned int _Nb> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::bitset<_Nb>&)’ 1472 | operator>>(std::basic_istream<_CharT, _Traits>& __is, bitset<_Nb>& __x) | ^~~~~~~~ /usr/include/c++/11/bitset:1472:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Nb’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72, from a.cpp:1: /usr/include/c++/11/iomanip:71:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::_Resetiosflags)’ 71 | operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f) | ^~~~~~~~ /usr/include/c++/11/iomanip:71:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: cannot convert ‘std::endl’ (type ‘<unresolved overloaded function type>’) to type ‘std::_Resetiosflags’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72, from a.cpp:1: /usr/include/c++/11/iomanip:101:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::_Setiosflags)’ 101 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f) | ^~~~~~~~ /usr/include/c++/11/iomanip:101:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: cannot convert ‘std::endl’ (type ‘<unresolved overloaded function type>’) to type ‘std::_Setiosflags’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72, from a.cpp:1: /usr/include/c++/11/iomanip:132:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::_Setbase)’ 132 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f) | ^~~~~~~~ /usr/include/c++/11/iomanip:132:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: cannot convert ‘std::endl’ (type ‘<unresolved overloaded function type>’) to type ‘std::_Setbase’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72, from a.cpp:1: /usr/include/c++/11/iomanip:170:5: note: candidate: ‘std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::_Setfill<_CharT>) [with _CharT = char; _Traits = std::char_traits<char>]’ 170 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f) | ^~~~~~~~ /usr/include/c++/11/iomanip:170:71: note: no known conversion for argument 2 from ‘<unresolved overloaded function type>’ to ‘std::_Setfill<char>’ 170 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f) | ~~~~~~~~~~~~~~~~~^~~ /usr/include/c++/11/iomanip:200:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::_Setprecision)’ 200 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f) | ^~~~~~~~ /usr/include/c++/11/iomanip:200:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: cannot convert ‘std::endl’ (type ‘<unresolved overloaded function type>’) to type ‘std::_Setprecision’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72, from a.cpp:1: /usr/include/c++/11/iomanip:230:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::_Setw)’ 230 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f) | ^~~~~~~~ /usr/include/c++/11/iomanip:230:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: cannot convert ‘std::endl’ (type ‘<unresolved overloaded function type>’) to type ‘std::_Setw’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72, from a.cpp:1: /usr/include/c++/11/iomanip:264:5: note: candidate: ‘template<class _CharT, class _Traits, class _MoneyT> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::_Get_money<_MoneyT>)’ 264 | operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f) | ^~~~~~~~ /usr/include/c++/11/iomanip:264:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_MoneyT’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:72, from a.cpp:1: /usr/include/c++/11/iomanip:418:5: note: candidate: ‘std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::_Get_time<_CharT>) [with _CharT = char; _Traits = std::char_traits<char>]’ 418 | operator>>(basic_istream<_CharT, _Traits>& __is, _Get_time<_CharT> __f) | ^~~~~~~~ /usr/include/c++/11/iomanip:418:72: note: no known conversion for argument 2 from ‘<unresolved overloaded function type>’ to ‘std::_Get_time<char>’ 418 | operator>>(basic_istream<_CharT, _Traits>& __is, _Get_time<_CharT> __f) | ~~~~~~~~~~~~~~~~~~^~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from a.cpp:1: /usr/include/c++/11/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::_Expr<_Dom2, typename _Dom2::value_type>&)’ 414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: ‘std::basic_istream<char>::__istream_type’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from a.cpp:1: /usr/include/c++/11/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)’ 414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: ‘std::basic_istream<char>::__istream_type’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from a.cpp:1: /usr/include/c++/11/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const typename _Dom::value_type&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)’ 414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Dom’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from a.cpp:1: /usr/include/c++/11/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const std::_Expr<_Dom1, typename _Dom1::value_type>&, const std::valarray<typename _Dom::value_type>&)’ 414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: ‘std::basic_istream<char>::__istream_type’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::_Expr<_Dom1, typename _Dom1::value_type>’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/valarray:603, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from a.cpp:1: /usr/include/c++/11/bits/valarray_after.h:414:5: note: candidate: ‘template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__shift_right, typename _Dom1::value_type>::result_type> std::operator>>(const std::valarray<typename _Dom::value_type>&, const std::_Expr<_Dom1, typename _Dom1::value_type>&)’ 414 | _DEFINE_EXPR_BINARY_OPERATOR(>>, struct std::__shift_right) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/bits/valarray_after.h:414:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Dom’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from a.cpp:1: /usr/include/c++/11/valarray:1195:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_right, _Tp>::result_type> std::operator>>(const std::valarray<_Tp>&, const std::valarray<_Tp>&)’ 1195 | _DEFINE_BINARY_OPERATOR(>>, __shift_right) | ^~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/valarray:1195:1: note: template argument deduction/substitution failed: a.cpp:7:18: note: ‘std::basic_istream<char>::__istream_type’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::valarray<_Tp>’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from a.cpp:1: /usr/include/c++/11/valarray:1195:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__shift_right, _Tp>::result_type> std::operator>>(const std::valarray<_Tp>&, const typename std::valarray<_Tp>::value_type&)’ 1195 | _DEFINE_BINARY_OPERATOR(>>, __shift_right) | ^~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/valarray:1195:1: note: template argument deduction/substitution failed: a.cpp:7:18: note: ‘std::basic_istream<char>::__istream_type’ {aka ‘std::basic_istream<char>’} is not derived from ‘const std::valarray<_Tp>’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:95, from a.cpp:1: /usr/include/c++/11/valarray:1195:1: note: candidate: ‘template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__shift_right, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__shift_right, _Tp>::result_type> std::operator>>(const typename std::valarray<_Tp>::value_type&, const std::valarray<_Tp>&)’ 1195 | _DEFINE_BINARY_OPERATOR(>>, __shift_right) | ^~~~~~~~~~~~~~~~~~~~~~~ /usr/include/c++/11/valarray:1195:1: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_Tp’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/random:51, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:108, from a.cpp:1: /usr/include/c++/11/bits/random.tcc:921:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::uniform_int_distribution<_IntType>&)’ 921 | operator>>(std::basic_istream<_CharT, _Traits>& __is, | ^~~~~~~~ /usr/include/c++/11/bits/random.tcc:921:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_IntType’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/random:51, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:108, from a.cpp:1: /usr/include/c++/11/bits/random.tcc:982:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::uniform_real_distribution<_IntType>&)’ 982 | operator>>(std::basic_istream<_CharT, _Traits>& __is, | ^~~~~~~~ /usr/include/c++/11/bits/random.tcc:982:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_RealType’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/random:51, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:108, from a.cpp:1: /usr/include/c++/11/bits/random.tcc:2167:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::cauchy_distribution<_RealType>&)’ 2167 | operator>>(std::basic_istream<_CharT, _Traits>& __is, | ^~~~~~~~ /usr/include/c++/11/bits/random.tcc:2167:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_RealType’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/random:49, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:108, from a.cpp:1: /usr/include/c++/11/bits/random.h:3722:5: note: candidate: ‘template<class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::bernoulli_distribution&)’ 3722 | operator>>(std::basic_istream<_CharT, _Traits>& __is, | ^~~~~~~~ /usr/include/c++/11/bits/random.h:3722:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: cannot convert ‘std::endl’ (type ‘<unresolved overloaded function type>’) to type ‘std::bernoulli_distribution&’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/random:51, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:108, from a.cpp:1: /usr/include/c++/11/bits/random.tcc:1124:5: note: candidate: ‘template<class _IntType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::geometric_distribution<_IntType>&)’ 1124 | operator>>(std::basic_istream<_CharT, _Traits>& __is, | ^~~~~~~~ /usr/include/c++/11/bits/random.tcc:1124:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_IntType’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/random:51, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:108, from a.cpp:1: /usr/include/c++/11/bits/random.tcc:1775:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::exponential_distribution<_RealType>&)’ 1775 | operator>>(std::basic_istream<_CharT, _Traits>& __is, | ^~~~~~~~ /usr/include/c++/11/bits/random.tcc:1775:5: note: template argument deduction/substitution failed: a.cpp:7:18: note: couldn’t deduce template parameter ‘_RealType’ 7 | cin>>number>>endl; | ^~~~ In file included from /usr/include/c++/11/random:51, from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:108, from a.cpp:1: /usr/include/c++/11/bits/random.tcc:2561:5: note: candidate: ‘template<class _RealType, class _CharT, class _Traits> std::basic_istream<_CharT, _Traits>& std::operator>>(std::basic_istream<_CharT, _Traits>&, std::weibull_distribution<_RealType>&)’ 2561 | operator>>(std::basic_istream<_CharT, _Traits>& __is, | ^~~~~~~~教我怎么看编译错误的原因
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