Compilare: user.cpp: In function ‘int main()’: user.cpp:11:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:13:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&v[i]); ^ user.cpp:26:15: warning: ‘l’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (i=l+1;i<=n;i++) ^