Compilare: user.cpp: In function ‘int main()’: user.cpp:13:26: warning: variable ‘f1’ set but not used [-Wunused-but-set-variable] int n,i,x,k,difmax=0,f1,f2; ^ user.cpp:13:29: warning: variable ‘f2’ set but not used [-Wunused-but-set-variable] int n,i,x,k,difmax=0,f1,f2; ^ user.cpp:11:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("vila2.in","r",stdin); ^ user.cpp:12:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("vila2.out","w",stdout); ^ user.cpp:14:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:18:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^