Compilare: user.cpp: In function ‘int main()’: user.cpp:82:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j,n,t,nr; ^ user.cpp:82:15: warning: unused variable ‘t’ [-Wunused-variable] int i,j,n,t,nr; ^ user.cpp:82:17: warning: unused variable ‘nr’ [-Wunused-variable] int i,j,n,t,nr; ^ user.cpp:83:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inv.in","r",stdin); ^ user.cpp:84:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("inv.out","w",stdout); ^ user.cpp:87:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:91:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^