Compilare: user.cpp: In function ‘int main()’: user.cpp:13:30: warning: unused variable ‘l1’ [-Wunused-variable] int n,f1,f2,f3,i,s,inter,l1,l2; ^ user.cpp:13:33: warning: unused variable ‘l2’ [-Wunused-variable] int n,f1,f2,f3,i,s,inter,l1,l2; ^ user.cpp:14:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:17:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i]); ^