View Compilation Error

0_0_22895215_1663.cpp: In function 'int main()':
0_0_22895215_1663.cpp:19:19: error: invalid user-defined conversion from 'std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}' to 'const char*' [-fpermissive]
 while(scanf(cin>>n>>m)
                   ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:44:0,
                 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_22895215_1663.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_ios.h:115:7: note: candidate is: std::basic_ios<_CharT, _Traits>::operator void*() const [with _CharT = char; _Traits = std::char_traits<char>] <near match>
       operator void*() const
       ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/basic_ios.h:115:7: note:   no known conversion from 'void*' to 'const char*'
0_0_22895215_1663.cpp:20:1: error: expected ')' before '{' token
 {
 ^