Compilare: main.cpp: In function 'int main()': main.cpp:78:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < p.size(); i++) ~~^~~~~~~~~~ main.cpp:90:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 3; i < p.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'int semn(point, point, point)': main.cpp:46:1: warning: control reaches end of non-void function [-Wreturn-type] } ^