Compilare: user.cpp: In function ‘void div(char*, long long int)’: user.cpp:24:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] for (; A[0] > 1 && !A[A[0]]; A[0]--); ^ user.cpp: In function ‘int main()’: user.cpp:28:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm3.in","r",stdin); ^ user.cpp:29:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm3.out","w",stdout); ^ user.cpp:30:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^ user.cpp:31:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i=0;i<n;i++) scanf("%lld",&v[i]); ^ user.cpp:32:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i=0;i<n;i++) scanf("%lld",&a[i]); ^