View Compilation Error

0_0_13503366_15159.cpp:2:1: error: 'use' does not name a type
 use  namespace  std;
 ^
0_0_13503366_15159.cpp: In function 'int main(int, char**)':
0_0_13503366_15159.cpp:5:2: error: 'cin' was not declared in this scope
  cin>>a>>b;
  ^
0_0_13503366_15159.cpp:5:2: note: suggested alternative:
In file included from 0_0_13503366_15159.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_13503366_15159.cpp:6:2: error: 'cou' was not declared in this scope
  cou<<a+b; 
  ^