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View Compilation Error

0_0_26647181_3519.cpp: In function 'int main()':
0_0_26647181_3519.cpp:4:12: error: 'cin' was not declared in this scope
      while(cin >> T >> n >> B){
            ^
0_0_26647181_3519.cpp:4:12: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:74:0,
                 from 0_0_26647181_3519.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:60:18: note:   'std::cin'
   extern istream cin;  /// Linked to standard input
                  ^
0_0_26647181_3519.cpp:11:6: error: 'cout' was not declared in this scope
      cout << "Case " << cnt++ << ": " << fixed << setprecision(2)
      ^
0_0_26647181_3519.cpp:11:6: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:74:0,
                 from 0_0_26647181_3519.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^
0_0_26647181_3519.cpp:11:42: error: 'fixed' was not declared in this scope
      cout << "Case " << cnt++ << ": " << fixed << setprecision(2)
                                          ^
0_0_26647181_3519.cpp:11:42: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:42:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_26647181_3519.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/ios_base.h:958:3: note:   'std::fixed'
   fixed(ios_base& __base)
   ^
0_0_26647181_3519.cpp:11:65: error: 'setprecision' was not declared in this scope
      cout << "Case " << cnt++ << ": " << fixed << setprecision(2)
                                                                 ^
0_0_26647181_3519.cpp:11:65: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:71:0,
                 from 0_0_26647181_3519.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iomanip:195:3: note:   'std::setprecision'
   setprecision(int __n)
   ^
0_0_26647181_3519.cpp:12:19: error: 'endl' was not declared in this scope
 << sum/(B*1.0) << endl << endl;
                   ^
0_0_26647181_3519.cpp:12:19: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:39:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_26647181_3519.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:564:5: note:   'std::endl'
     endl(basic_ostream<_CharT, _Traits>& __os)
     ^


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