/in/foo.cc: In function 'int main()':
/in/foo.cc:6:7: error: expected initializer before 'b'
 int a b;
       ^
/in/foo.cc:7:6: error: 'a' was not declared in this scope
 cin>>a>>b;
      ^
/in/foo.cc:7:9: error: 'b' was not declared in this scope
 cin>>a>>b;
         ^