prog.cpp: In function ‘int main()’:
prog.cpp:5: warning: comparison with string literal results in unspecified behaviour
prog.cpp:5: error: invalid initialization of non-const reference of type ‘std::ios_base&’ from a temporary of type ‘bool’
/usr/lib/gcc/i686-pc-linux-gnu/4.3.4/include/g++-v4/bits/ios_base.h:791: error: in passing argument 1 of ‘std::ios_base& std::boolalpha(std::ios_base&)’