Compilare: user.cpp: In function ‘int main()’: user.cpp:9:13: warning: unused variable ‘nr’ [-Wunused-variable] int n,i,nr,xx,li1=1,lf1=1,so1=-999999999,si1=0,lg1=0,tot=0,poz,li2=1,lf2=1,so2=999999999,si2=0,lg2=0,lg; ^ 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); ^