Compilare: user.cpp: In function ‘int main()’: user.cpp:21:24: warning: operation on ‘v[i]’ may be undefined [-Wsequence-point] v[i]=v[i]++; ^ user.cpp:10:27: warning: variable ‘s’ set but not used [-Wunused-but-set-variable] int i,prim,n,q,nr,nr2,s=0; ^ user.cpp:8:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("densitate.in","r",stdin); ^ user.cpp:9:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("densitate.out","w",stdout); ^