Compilare: user.cpp: In function ‘int main()’: user.cpp:17:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[c]=i; ^ user.cpp:26:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] val=v[c]; ^ user.cpp:14:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d %d\n", &p, &n); ^