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View Compilation Error

0_0_37595116_32490.cpp:3:7: error: expected nested-name-specifier before 'namespaces'
 using namespaces std;
       ^
0_0_37595116_32490.cpp: In function 'int main()':
0_0_37595116_32490.cpp:7:9: error: 'cin' was not declared in this scope
  while (cin >> num) {
         ^
0_0_37595116_32490.cpp:7:9: note: suggested alternative:
In file included from 0_0_37595116_32490.cpp:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:60:18: note:   'std::cin'
   extern istream cin;  /// Linked to standard input
                  ^
0_0_37595116_32490.cpp:19:4: error: 'cout' was not declared in this scope
    cout << two[i];
    ^
0_0_37595116_32490.cpp:19:4: note: suggested alternative:
In file included from 0_0_37595116_32490.cpp:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^
0_0_37595116_32490.cpp:20:3: error: 'cout' was not declared in this scope
   cout << endl;
   ^
0_0_37595116_32490.cpp:20:3: note: suggested alternative:
In file included from 0_0_37595116_32490.cpp:1:0:
GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:61:18: note:   'std::cout'
   extern ostream cout;  /// Linked to standard output
                  ^
0_0_37595116_32490.cpp:20:11: error: 'endl' was not declared in this scope
   cout << endl;
           ^
0_0_37595116_32490.cpp:20:11: note: suggested alternative:
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39:0,
                 from 0_0_37595116_32490.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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