Compilare: user.cpp: In member function ‘dPoint Point::Rotate(double)’: user.cpp:66:16: warning: unused variable ‘angsin’ [-Wunused-variable] double angsin = sin(ang); ^ user.cpp:67:16: warning: unused variable ‘angcos’ [-Wunused-variable] double angcos = cos(ang); ^ user.cpp: In function ‘int main()’: user.cpp:182:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.in","r",stdin); ^ user.cpp:183:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("rubarba.out","w",stdout); ^ user.cpp:185:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld",&n); ^ user.cpp: In member function ‘void Point::read()’: user.cpp:47:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] void read(){ scanf("%d %d",&x,&y); } ^