Compilare: user.cpp: In function ‘int main()’: user.cpp:6:38: 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:7:40: 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); ^ user.cpp:8:16: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] int b,v,q,prim,a,n,i,x,t=0; ^ user.cpp:8:5: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] int b,v,q,prim,a,n,i,x,t=0; ^