Compilare: user.cpp: In function ‘void Hull()’: user.cpp:77:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(var i=0; i<Part.size(); i++) { ^ user.cpp: In function ‘double Aria()’: user.cpp:107:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(var i=1; i<Inter.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:157:13: warning: unused variable ‘i’ [-Wunused-variable] var i; ^