Compilare: user.cpp: In function ‘int main()’: user.cpp:9:13: warning: unused variable ‘nr’ [-Wunused-variable] int n,i,nr,xx,li=1,lf=1,so=999999999,si=0,lg=0,tot=0,poz=1,neg=0; ^ user.cpp:12:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:15:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&v[i],&xx); ^