Compilare: user.cpp: In function ‘int main()’: user.cpp:28:8: warning: unused variable ‘n’ [-Wunused-variable] ll n=0,d,p,x,i; ^ user.cpp:28:12: warning: unused variable ‘d’ [-Wunused-variable] ll n=0,d,p,x,i; ^ user.cpp:29:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%lld",&b); ^