Compilare: user.cpp: In function ‘int main()’: user.cpp:8:19: warning: unused variable ‘m’ [-Wunused-variable] int n,s,p,x,dr,st,m,ok; ^ user.cpp:6:29: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("fact.in","r",stdin); ^ user.cpp:7:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("fact.out","w",stdout); ^ user.cpp:33:1: warning: ‘s’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(s!=x)cout<<-1; ^