Compilare: user.cpp: In function ‘int main()’: user.cpp:19:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%d%d",&n,&d); ^ user.cpp:21:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(si,"%hi %hi",&x[i].x,&x[i].y); ^ user.cpp:30:17: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] maxx=fabs(a); ^