View Compilation Error

In file included from GCC4.9.2/x86_64-w64-mingw32/include/locale.h:12:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/clocale:42,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/c++locale.h:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/localefwd.h:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:41,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ostream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/iostream:39,
                 from 0_0_30291275_25887.cpp:1:
0_0_30291275_25887.cpp: In function 'int main()':
0_0_30291275_25887.cpp:8:31: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
  while( scanf("%d%d",&m,&n != EOF ) )
                               ^
0_0_30291275_25887.cpp:15:12: error: 'sum' was not declared in this scope
    cout << sum << endl ;
            ^