Compilare: user.cpp: In function ‘int main()’: user.cpp:11:18: warning: variable ‘nr’ set but not used [-Wunused-but-set-variable] int n,i,ss=0,nr,tot=0,ma=0,ok=0; ^ user.cpp:11:32: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int n,i,ss=0,nr,tot=0,ma=0,ok=0; ^ user.cpp:15:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^