Compilare: user.cpp: In function ‘int main()’: user.cpp:25:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&n,&p); ^ user.cpp:30:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%llu",&a[i]); ^ user.cpp:49:32: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] fprintf(fout,"\n%d\n",poz+1); ^