foo.cpp:1:21: warning: extra tokens at end of #include directive [enabled by default]
foo.cpp: In function 'int main()':
foo.cpp:17:34: error: 'fabs' was not declared in this scope
foo.cpp:17:59: error: 'hypot' was not declared in this scope
foo.cpp:20:21: error: 'setprecision' was not declared in this scope