Compilare: user.cpp: In function ‘int romb(double, double, int, double, double, double, double, int)’: user.cpp:36:5: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘void f()’: user.cpp:40:45: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lf%lf%d%lf%lf",&dx,&dy,&k,&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:45:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen ("romb.in","r",stdin); ^ user.cpp:46:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("romb.out","w",stdout); ^ user.cpp:48:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^