Compilare: user.cpp: In function ‘void lire()’: user.cpp:26:35: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (p.x<mp.x || p.x==mp.x && p.y<mp.y) mp=p; ^ user.cpp: In function ‘void ca()’: user.cpp:6:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define as a.size() ^ user.cpp:34:21: note: in expansion of macro ‘as’ for (int i=0; i<as; i++) ^ user.cpp: In function ‘void hull()’: user.cpp:6:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define as a.size() ^ user.cpp:64:21: note: in expansion of macro ‘as’ for (int i=3; i<as; i++) ^ user.cpp: In function ‘void ecrire()’: user.cpp:7:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define hs h.size() ^ user.cpp:80:21: note: in expansion of macro ‘hs’ for (int i=0; i<hs; i++) ^ user.cpp: At global scope: user.cpp:86:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^