Compilare: user.cpp: In function ‘void calc(long long int, char)’: user.cpp:35:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] long long x1=vf[ch],x2=vf[change(ch)]; ^ user.cpp:35:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] long long x1=vf[ch],x2=vf[change(ch)]; ^ user.cpp: In function ‘int main()’: user.cpp:73:14: warning: array subscript has type ‘char’ [-Wchar-subscripts] vf[v[i]]++; ^ user.cpp:70:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&k,&q); ^ user.cpp:77:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lld " ,&poz); ^