Compilare: user.cpp: In function ‘int main()’: user.cpp:33:45: warning: array subscript has type ‘char’ [-Wchar-subscripts] prec[conf]=prec[conf-pow]*v[lg[pow]]/gcd(v[lg[pow]],prec[conf-pow]); ^ user.cpp:33:60: warning: array subscript has type ‘char’ [-Wchar-subscripts] prec[conf]=prec[conf-pow]*v[lg[pow]]/gcd(v[lg[pow]],prec[conf-pow]); ^ user.cpp:44:9: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(prec[conf]>0) ^ user.cpp:21:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&k); ^ user.cpp:23:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&v[i]); ^