Compilare: user.cpp: In function ‘int32_t main()’: user.cpp:18:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&k); ^ user.cpp:19:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i=1;i<=n;++i) fscanf(f,"%d",&p[i]); ^