Compilare: user.cpp: In member function ‘bool punct::trigorder(punct, punct)’: user.cpp:10:16: warning: unused variable ‘r’ [-Wunused-variable] double r=(p1.x*p2.y+x*p1.y+y*p2.x-p1.x*y-p2.x*p1.y-p2.y*x); ^ user.cpp: In function ‘void citire()’: user.cpp:17:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:21:52: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf",&vPuncte[i].x,&vPuncte[i].y); ^ user.cpp: In function ‘int main()’: user.cpp:35:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.in","r",stdin); ^ user.cpp:36:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.out","w",stdout); ^