Compilare: user.cpp: In function ‘void adun(char*, char*)’: user.cpp:17:15: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[v[0]]=1; ^ user.cpp: In function ‘int main()’: user.cpp:23:11: warning: unused variable ‘x’ [-Wunused-variable] int n,i,j,x; ^ user.cpp:21:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] {freopen ("munte3.in","r",stdin); ^ user.cpp:22:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("munte3.out","w",stdout); ^ user.cpp:24:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^