Compilare: user.cpp: In function ‘void div()’: user.cpp:13:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] for(; nr[0]>1 && nr[nr[0]]==0; nr[0]--); ^ user.cpp: In function ‘int main()’: user.cpp:37:18: warning: unused variable ‘n’ [-Wunused-variable] int t, i, j, n, ans, k; ^ user.cpp:40:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d ", &t); ^ user.cpp:43:29: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(nr+1, MAXN, fin); ^ In file included from /usr/include/stdio.h:934:0, from /usr/include/c++/4.8/cstdio:42, from user.cpp:1: In function ‘char* fgets(char*, int, FILE*)’, inlined from ‘int main()’ at user.cpp:43:29: /usr/include/i386-linux-gnu/bits/stdio2.h:253:58: warning: call to ‘__fgets_chk_warn’ declared with attribute warning: fgets called with bigger size than length of destination buffer [enabled by default] return __fgets_chk_warn (__s, __bos (__s), __n, __stream); ^