/in/foo.cc: In function 'int main()':
/in/foo.cc:7:6: error: no match for 'operator>>' (operand types are 'std::istream {aka std::basic_istream<char>}' and 'const char [28]')
  cin >> "请输入原来的赞数：" >>a;
  ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/6/iostream:40:0,
                 from /in/foo.cc:1:
/usr/include/c++/6/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>
       operator>>(bool& __n)
       ^~~~~~~~
/usr/include/c++/6/istream:168:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:7:9: error: invalid initialization of non-const reference of type 'bool&' from an rvalue of type 'bool'
  cin >> "请输入原来的赞数：" >>a;
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/6/iostream:40:0,
                 from /in/foo.cc:1:
/usr/include/c++/6/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>
       operator>>(short& __n);
       ^~~~~~~~
/usr/include/c++/6/istream:172:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:7:9: error: invalid conversion from 'const char*' to 'short int' [-fpermissive]
  cin >> "请输入原来的赞数：" >>a;
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:7:9: error: cannot bind rvalue '(short int)((const char*)"\37777777750\37777777657\37777777667\37777777750\37777777676\37777777623\37777777745\37777777605\37777777645\37777777745\37777777616\37777777637\37777777746\37777777635\37777777645\37777777747\37777777632\37777777604\37777777750\37777777665\37777777636\37777777746\37777777625\37777777660\37777777757\37777777674\37777777632")' to 'short int&'
In file included from /usr/include/c++/6/iostream:40:0,
                 from /in/foo.cc:1:
/usr/include/c++/6/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>
       operator>>(unsigned short& __n)
       ^~~~~~~~
/usr/include/c++/6/istream:175:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:7:9: error: invalid conversion from 'const char*' to 'short unsigned int' [-fpermissive]
  cin >> "请输入原来的赞数：" >>a;
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:7:9: error: cannot bind rvalue '(short unsigned int)((const char*)"\37777777750\37777777657\37777777667\37777777750\37777777676\37777777623\37777777745\37777777605\37777777645\37777777745\37777777616\37777777637\37777777746\37777777635\37777777645\37777777747\37777777632\37777777604\37777777750\37777777665\37777777636\37777777746\37777777625\37777777660\37777777757\37777777674\37777777632")' to 'short unsigned int&'
In file included from /usr/include/c++/6/iostream:40:0,
                 from /in/foo.cc:1:
/usr/include/c++/6/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>
       operator>>(int& __n);
       ^~~~~~~~
/usr/include/c++/6/istream:179:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:7:9: error: invalid conversion from 'const char*' to 'int' [-fpermissive]
  cin >> "请输入原来的赞数：" >>a;
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:7:9: error: cannot bind rvalue '(int)((const char*)"\37777777750\37777777657\37777777667\37777777750\37777777676\37777777623\37777777745\37777777605\37777777645\37777777745\37777777616\37777777637\37777777746\37777777635\37777777645\37777777747\37777777632\37777777604\37777777750\37777777665\37777777636\37777777746\37777777625\37777777660\37777777757\37777777674\37777777632")' to 'int&'
In file included from /usr/include/c++/6/iostream:40:0,
                 from /in/foo.cc:1:
/usr/include/c++/6/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>
       operator>>(unsigned int& __n)
       ^~~~~~~~
/usr/include/c++/6/istream:182:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:7:9: error: invalid conversion from 'const char*' to 'unsigned int' [-fpermissive]
  cin >> "请输入原来的赞数：" >>a;
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:7:9: error: cannot bind rvalue '(unsigned int)((const char*)"\37777777750\37777777657\37777777667\37777777750\37777777676\37777777623\37777777745\37777777605\37777777645\37777777745\37777777616\37777777637\37777777746\37777777635\37777777645\37777777747\37777777632\37777777604\37777777750\37777777665\37777777636\37777777746\37777777625\37777777660\37777777757\37777777674\37777777632")' to 'unsigned int&'
In file included from /usr/include/c++/6/iostream:40:0,
                 from /in/foo.cc:1:
/usr/include/c++/6/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>
       operator>>(long& __n)
       ^~~~~~~~
/usr/include/c++/6/istream:186:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:7:9: error: invalid conversion from 'const char*' to 'long int' [-fpermissive]
  cin >> "请输入原来的赞数：" >>a;
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:7:9: error: cannot bind rvalue '(long int)((const char*)"\37777777750\37777777657\37777777667\37777777750\37777777676\37777777623\37777777745\37777777605\37777777645\37777777745\37777777616\37777777637\37777777746\37777777635\37777777645\37777777747\37777777632\37777777604\37777777750\37777777665\37777777636\37777777746\37777777625\37777777660\37777777757\37777777674\37777777632")' to 'long int&'
In file included from /usr/include/c++/6/iostream:40:0,
                 from /in/foo.cc:1:
/usr/include/c++/6/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>
       operator>>(unsigned long& __n)
       ^~~~~~~~
/usr/include/c++/6/istream:190:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:7:9: error: invalid conversion from 'const char*' to 'long unsigned int' [-fpermissive]
  cin >> "请输入原来的赞数：" >>a;
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/in/foo.cc:7:9: error: cannot bind rvalue '(long unsigned int)((const char*)"\37777777750\37777777657\37777777667\37777777750\37777777676\37777777623\37777777745\37777777605\37777777645\37777777745\37777777616\37777777637\37777777746\37777777635\37777777645\37777777747\37777777632\37777777604\37777777750\37777777665\37777777636\37777777746\37777777625\37777777660\37777777757\37777777674\37777777632")' to 'long unsigned int&'
In file included from /usr/include/c++/6/iostream:40:0,
                 from /in/foo.cc:1:
/usr/include/c++/6/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>
       operator>>(long long& __n)
       ^~~~~~~~
/usr/include/c++/6/istream:195:7: note:   conversion of argument 1 would be ill-formed:
/in/foo.cc:7:9: error: in