Compilare: user.cpp: In function ‘int main()’: user.cpp:10:17: warning: unused variable ‘s’ [-Wunused-variable] int n,i,x,y,s,prod,sum,j,gradmax=0,k,q,nr; ^ user.cpp:10:24: warning: unused variable ‘sum’ [-Wunused-variable] int n,i,x,y,s,prod,sum,j,gradmax=0,k,q,nr; ^~~ user.cpp:10:28: warning: unused variable ‘j’ [-Wunused-variable] int n,i,x,y,s,prod,sum,j,gradmax=0,k,q,nr; ^ user.cpp:11:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iepuri2.in","r",stdin); ^ user.cpp:12:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("iepuri2.out","w",stdout); ^ user.cpp:13:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&k); ^ user.cpp:16:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^