Compilare: user.cpp: In function ‘void read(int&, int&, int&)’: user.cpp:9:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("fractal.in","r",stdin); ^ user.cpp:10:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("fractal.out","w",stdout); ^ user.cpp:11:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&k,&x,&y); ^ user.cpp: In function ‘int findCadran(int, int, int)’: user.cpp:27:1: warning: control reaches end of non-void function [-Wreturn-type] } ^