Eroare de compilare: user.cpp: In function ‘void lire()’: user.cpp:25:35: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if (p.x<mp.x || p.x==mp.x && p.y<mp.y) mp; ^ user.cpp:25:50: warning: statement has no effect [-Wunused-value] if (p.x<mp.x || p.x==mp.x && p.y<mp.y) mp; ^ user.cpp: In function ‘void ca()’: user.cpp:5:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define as a.size() ^ user.cpp:33:21: note: in expansion of macro ‘as’ for (int i=0; i<as; i++) ^ user.cpp: In function ‘void hull()’: user.cpp:5:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define as a.size() ^ user.cpp:63:21: note: in expansion of macro ‘as’ for (int i=3; i<as; i++) ^ user.cpp: In function ‘void ecrire()’: user.cpp:6:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define hs h.size() ^ user.cpp:79:21: note: in expansion of macro ‘hs’ for (int i=0; i<hs; i++) ^ user.cpp: At global scope: user.cpp:85:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:89:30: error: ‘sort’ was not declared in this scope sort(a.begin(),a.end(),cA); ^