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View Compilation Error

0_0_38622349_27049.cpp: In function 'int main()':
0_0_38622349_27049.cpp:48:8: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'std::__cxx11::string [3]' {aka 'std::__cxx11::basic_string<char> [3]'})
    cin >> op;
    ~~~~^~~~~
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/sstream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/complex:45,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ccomplex:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38622349_27049.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/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)
       ^~~~~~~~
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/istream:168:7: note:   conversion of argument 1 would be ill-formed:
0_0_38622349_27049.cpp:48:11: error: cannot bind non-const lvalue reference of type 'bool&' to an rvalue of type 'bool'
    cin >> op;
           ^~
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/sstream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/complex:45,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ccomplex:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38622349_27049.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/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);
       ^~~~~~~~
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/istream:172:7: note:   conversion of argument 1 would be ill-formed:
0_0_38622349_27049.cpp:48:11: error: invalid conversion from 'std::__cxx11::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'short int' [-fpermissive]
    cin >> op;
           ^~
0_0_38622349_27049.cpp:48:11: error: cannot bind rvalue '(short int)((std::__cxx11::string*)(& op))' to 'short int&'
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/sstream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/complex:45,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ccomplex:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38622349_27049.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/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)
       ^~~~~~~~
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/istream:175:7: note:   conversion of argument 1 would be ill-formed:
0_0_38622349_27049.cpp:48:11: error: invalid conversion from 'std::__cxx11::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'short unsigned int' [-fpermissive]
    cin >> op;
           ^~
0_0_38622349_27049.cpp:48:11: error: cannot bind rvalue '(short unsigned int)((std::__cxx11::string*)(& op))' to 'short unsigned int&'
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/sstream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/complex:45,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ccomplex:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38622349_27049.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/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);
       ^~~~~~~~
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/istream:179:7: note:   conversion of argument 1 would be ill-formed:
0_0_38622349_27049.cpp:48:11: error: invalid conversion from 'std::__cxx11::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'int' [-fpermissive]
    cin >> op;
           ^~
0_0_38622349_27049.cpp:48:11: error: cannot bind rvalue '(int)((std::__cxx11::string*)(& op))' to 'int&'
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/sstream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/complex:45,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ccomplex:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38622349_27049.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/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)
       ^~~~~~~~
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/istream:182:7: note:   conversion of argument 1 would be ill-formed:
0_0_38622349_27049.cpp:48:11: error: invalid conversion from 'std::__cxx11::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'unsigned int' [-fpermissive]
    cin >> op;
           ^~
0_0_38622349_27049.cpp:48:11: error: cannot bind rvalue '(unsigned int)((std::__cxx11::string*)(& op))' to 'unsigned int&'
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/sstream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/complex:45,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ccomplex:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38622349_27049.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/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)
       ^~~~~~~~
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/istream:186:7: note:   conversion of argument 1 would be ill-formed:
0_0_38622349_27049.cpp:48:11: error: invalid conversion from 'std::__cxx11::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'long int' [-fpermissive]
    cin >> op;
           ^~
0_0_38622349_27049.cpp:48:11: error: cannot bind rvalue '(long int)((std::__cxx11::string*)(& op))' to 'long int&'
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/sstream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/complex:45,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ccomplex:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38622349_27049.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/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)
       ^~~~~~~~
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/istream:190:7: note:   conversion of argument 1 would be ill-formed:
0_0_38622349_27049.cpp:48:11: error: invalid conversion from 'std::__cxx11::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'long unsigned int' [-fpermissive]
    cin >> op;
           ^~
0_0_38622349_27049.cpp:48:11: error: cannot bind rvalue '(long unsigned int)((std::__cxx11::string*)(& op))' to 'long unsigned int&'
In file included from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/sstream:38,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/complex:45,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/ccomplex:39,
                 from gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_38622349_27049.cpp:1:
gcc-8.5.0/lib/gcc/x86_64-w64-mingw32/8.5.0/inclu


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