Compilare: user.cpp: In function ‘int main()’: user.cpp:12:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&n); ^ user.cpp:14:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d",&x); ^ user.cpp:32:47: warning: ‘p2’ may be used uninitialized in this function [-Wmaybe-uninitialized] dif=max(max(v[i],v[p2]-v[i]),v[n]-v[p2])-min(min(v[i],v[p2]-v[i]),v[n]-v[p2]); ^