Compilare: main.cpp: In function 'Line perpLine(Line)': main.cpp:64:8: warning: unused variable 'ans' [-Wunused-variable] 64 | Line ans = {-l.b, l.a, 0}; | ^~~ main.cpp:65:1: warning: no return statement in function returning non-void [-Wreturn-type] 65 | } | ^ main.cpp: In function 'int main()': main.cpp:102:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | for (int i = 2; i < hull.size(); ++i) | ~~^~~~~~~~~~~~~ main.cpp:108:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 108 | for (int i = 0; i < hull.size(); ++i) { | ~~^~~~~~~~~~~~~ main.cpp:119:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<double, double> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 119 | for (int i = 1; i < hull.size(); ++i) { | ~~^~~~~~~~~~~~~ main.cpp:95:7: warning: variable 'ba' set but not used [-Wunused-but-set-variable] 95 | int ba = 0, ta = 0, la = 0, ra = 0; | ^~ main.cpp:95:15: warning: variable 'ta' set but not used [-Wunused-but-set-variable] 95 | int ba = 0, ta = 0, la = 0, ra = 0; | ^~ main.cpp:95:23: warning: variable 'la' set but not used [-Wunused-but-set-variable] 95 | int ba = 0, ta = 0, la = 0, ra = 0; | ^~ main.cpp:95:31: warning: variable 'ra' set but not used [-Wunused-but-set-variable] 95 | int ba = 0, ta = 0, la = 0, ra = 0; | ^~