Compilare: user.cpp: In function ‘bool rightOfLine(std::pair<double, double>, std::pair<double, double>, std::pair<double, double>)’: user.cpp:31:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ( a.first == b.first ) ^ user.cpp:37:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ( a.second == b.second ) ^ user.cpp: In function ‘int main()’: user.cpp:90:38: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘std::vector<std::pair<double, double> >::size_type {aka unsigned int}’ [-Wformat=] printf ( "%ld\n", queue.size ( ) ); ^ user.cpp:91:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( long i = 0; i < queue.size ( ); i++ ) ^